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20312550450131 = 237133037376511
BaseRepresentation
bin1001001111001011000100…
…10110101010001111010011
32122220212020120021110101012
410213211202112222033103
510130300100403401011
6111111242403001135
74164350636016002
oct447454226521723
978825216243335
1020312550450131
116521560200275
1223408600691ab
13b446083144a4
145031c0146c39
15253599296a8b
hex1279625aa3d3

20312550450131 has 16 divisors (see below), whose sum is σ = 21494943571968. Its totient is φ = 19155111914400.

The previous prime is 20312550450121. The next prime is 20312550450167. The reversal of 20312550450131 is 13105405521302.

It is a de Polignac number, because none of the positive numbers 2k-20312550450131 is a prime.

It is a super-2 number, since 2×203125504501312 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312550450121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53761166 + ... + 54137676.

It is an arithmetic number, because the mean of its divisors is an integer number (1343433973248).

Almost surely, 220312550450131 is an apocalyptic number.

20312550450131 is a deficient number, since it is larger than the sum of its proper divisors (1182393121837).

20312550450131 is a wasteful number, since it uses less digits than its factorization.

20312550450131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409642.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 20312550450131 its reverse (13105405521302), we get a palindrome (33417955971433).

The spelling of 20312550450131 in words is "twenty trillion, three hundred twelve billion, five hundred fifty million, four hundred fifty thousand, one hundred thirty-one".

Divisors: 1 23 71 1633 33037 376511 759851 2345627 8659753 26732281 53949421 614842463 12438793907 286092259861 883154367397 20312550450131