20423536056656 has 40 divisors (see below), whose sum is σ = 40164995984064. Its totient is φ = 10058404561920.

The previous prime is 20423536056587. The next prime is 20423536056689. The reversal of 20423536056656 is 65665063532402.

It is a junction number, because it is equal to n+sod(n) for n = 20423536056598 and 20423536056607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10537376 + ... + 12324096.

Almost surely, 2^{20423536056656} is an apocalyptic number.

It is an amenable number.

20423536056656 is a deficient number, since it is larger than the sum of its proper divisors (19741459927408).

20423536056656 is a wasteful number, since it uses less digits than its factorization.

20423536056656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797459 (or 1797453 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 53.

The spelling of 20423536056656 in words is "twenty trillion, four hundred twenty-three billion, five hundred thirty-six million, fifty-six thousand, six hundred fifty-six".