20856374307 has 12 divisors (see below), whose sum is σ = 30283603584. Its totient is φ = 13831451280.

The previous prime is 20856374303. The next prime is 20856374311. The reversal of 20856374307 is 70347365802.

20856374307 is a `hidden beast` number, since 2 + 0 + 8 + 5 + 637 + 4 + 3 + 0 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (20856374303) and next prime (20856374311).

It is not a de Polignac number, because 20856374307 - 2² = 20856374303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20856374303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6064708 + ... + 6068145.

It is an arithmetic number, because the mean of its divisors is an integer number (2523633632).

Almost surely, 2^20856374307 is an apocalyptic number.

20856374307 is a deficient number, since it is larger than the sum of its proper divisors (9427229277).

20856374307 is a wasteful number, since it uses less digits than its factorization.

20856374307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12133050 (or 12133047 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 20856374307 in words is "twenty billion, eight hundred fifty-six million, three hundred seventy-four thousand, three hundred seven".