20631939576256 has 56 divisors (see below), whose sum is σ = 40976820479520. Its totient is φ = 10307073487872.

The previous prime is 20631939576251. The next prime is 20631939576307. The reversal of 20631939576256 is 65267593913602.

It is a super-2 number, since 2×20631939576256² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20631939576251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209863026 + ... + 1209880078.

Almost surely, 2^{20631939576256} is an apocalyptic number.

It is an amenable number.

20631939576256 is a deficient number, since it is larger than the sum of its proper divisors (20344880903264).

20631939576256 is a wasteful number, since it uses less digits than its factorization.

20631939576256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32261 (or 32251 counting only the distinct ones).

The product of its (nonzero) digits is 110224800, while the sum is 64.

The spelling of 20631939576256 in words is "twenty trillion, six hundred thirty-one billion, nine hundred thirty-nine million, five hundred seventy-six thousand, two hundred fifty-six".