20344875831 has 12 divisors (see below), whose sum is σ = 33585191952. Its totient is φ = 11625643296.

The previous prime is 20344875809. The next prime is 20344875839. The reversal of 20344875831 is 13857844302.

20344875831 is a `hidden beast` number, since 20 + 3 + 4 + 48 + 7 + 583 + 1 = 666.

It is not a de Polignac number, because 20344875831 - 2⁵ = 20344875799 is a prime.

It is a super-2 number, since 2×20344875831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344875839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161467206 + ... + 161467331.

It is an arithmetic number, because the mean of its divisors is an integer number (2798765996).

Almost surely, 2^20344875831 is an apocalyptic number.

20344875831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20344875831 is a deficient number, since it is larger than the sum of its proper divisors (13240316121).

20344875831 is a wasteful number, since it uses less digits than its factorization.

20344875831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322934550 (or 322934547 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20344875831 in words is "twenty billion, three hundred forty-four million, eight hundred seventy-five thousand, eight hundred thirty-one".