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21425633972 = 2233116182503
BaseRepresentation
bin10011111101000100…
…010011101010110100
32001022012002222101222
4103331010103222310
5322334430241342
613502013405512
71355642612111
oct237504235264
961265088358
1021425633972
1190a5236a16
12419b499898
132035b60032
14107378b908
15855ec5ed2
hex4fd113ab4

21425633972 has 12 divisors (see below), whose sum is σ = 37608139296. Its totient is φ = 10680451320.

The previous prime is 21425633959. The next prime is 21425633989. The reversal of 21425633972 is 27933652412.

It is a super-5 number, since 5×214256339725 (a number of 53 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8089928 + ... + 8092575.

It is an arithmetic number, because the mean of its divisors is an integer number (3134011608).

Almost surely, 221425633972 is an apocalyptic number.

It is an amenable number.

21425633972 is a deficient number, since it is larger than the sum of its proper divisors (16182505324).

21425633972 is a wasteful number, since it uses less digits than its factorization.

21425633972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16182838 (or 16182836 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The spelling of 21425633972 in words is "twenty-one billion, four hundred twenty-five million, six hundred thirty-three thousand, nine hundred seventy-two".

Divisors: 1 2 4 331 662 1324 16182503 32365006 64730012 5356408493 10712816986 21425633972