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21425508349425 = 3352471391348541
BaseRepresentation
bin1001101111100100000111…
…10100000111010111110001
32210212020222111220201021000
410313302003310013113301
510302013420114140200
6113322424225152213
74340641033043415
oct467620364072761
983766874821230
1021425508349425
1169105639a0844
1224a04a748b669
13bc555584069b
1454100053ad45
152724d7630300
hex137c83d075f1

21425508349425 has 96 divisors (see below), whose sum is σ = 40200604853760. Its totient is φ = 11182777228800.

The previous prime is 21425508349393. The next prime is 21425508349517. The reversal of 21425508349425 is 52494380552412.

21425508349425 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 5 + 50 + 83 + 494 + 25 = 666.

It is not a de Polignac number, because 21425508349425 - 25 = 21425508349393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 441365655 + ... + 441414195.

It is an arithmetic number, because the mean of its divisors is an integer number (418756300560).

Almost surely, 221425508349425 is an apocalyptic number.

21425508349425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21425508349425 is a deficient number, since it is larger than the sum of its proper divisors (18775096504335).

21425508349425 is a wasteful number, since it uses less digits than its factorization.

21425508349425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62520 (or 62509 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 54.

The spelling of 21425508349425 in words is "twenty-one trillion, four hundred twenty-five billion, five hundred eight million, three hundred forty-nine thousand, four hundred twenty-five".

Divisors: 1 3 5 9 15 25 27 45 47 75 135 141 225 235 423 675 705 1175 1269 2115 3525 6345 10575 13913 31725 41739 48541 69565 125217 145623 208695 242705 347825 375651 436869 626085 653911 728115 1043475 1213525 1310607 1878255 1961733 2184345 2281427 3130425 3269555 3640575 5885199 6553035 6844281 9391275 9808665 10921725 11407135 16347775 17655597 20532843 29425995 32765175 34221405 49043325 57035675 61598529 88277985 102664215 147129975 171107025 307992645 441389925 513321075 675350933 1539963225 2026052799 3376754665 6078158397 10130263995 16883773325 18234475191 30390791985 31741493851 50651319975 91172375955 95224481553 151953959925 158707469255 285673444659 455861879775 476122407765 793537346275 857020333977 1428367223295 2380612038825 4285101669885 7141836116475 21425508349425