20656363213431 has 24 divisors (see below), whose sum is σ = 32591528860176. Its totient is φ = 12502812608640.

The previous prime is 20656363213399. The next prime is 20656363213457. The reversal of 20656363213431 is 13431236365602.

20656363213431 is a `hidden beast` number, since 2 + 0 + 6 + 5 + 6 + 3 + 632 + 1 + 3 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 20656363213431 - 2⁵ = 20656363213399 is a prime.

It is a super-2 number, since 2×20656363213431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20656363213531) 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 23 ways as a sum of consecutive naturals, for example, 134884750 + ... + 135037803.

It is an arithmetic number, because the mean of its divisors is an integer number (1357980369174).

Almost surely, 2^{20656363213431} is an apocalyptic number.

20656363213431 is a deficient number, since it is larger than the sum of its proper divisors (11935165646745).

20656363213431 is a wasteful number, since it uses less digits than its factorization.

20656363213431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269923343 (or 269923340 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 45.

The spelling of 20656363213431 in words is "twenty trillion, six hundred fifty-six billion, three hundred sixty-three million, two hundred thirteen thousand, four hundred thirty-one".