20456706844 has 12 divisors (see below), whose sum is σ = 40913413744. Its totient is φ = 8767160064.

The previous prime is 20456706833. The next prime is 20456706857. The reversal of 20456706844 is 44860765402.

It is a happy number.

20456706844 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20456706794 and 20456706803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365298309 + ... + 365298364.

Almost surely, 2^20456706844 is an apocalyptic number.

It is an amenable number.

20456706844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20456706844 is a wasteful number, since it uses less digits than its factorization.

20456706844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730596684 (or 730596682 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 20456706844 in words is "twenty billion, four hundred fifty-six million, seven hundred six thousand, eight hundred forty-four".