20713756 has 12 divisors (see below), whose sum is σ = 41427568. Its totient is φ = 8877312.

The previous prime is 20713741. The next prime is 20713799. The reversal of 20713756 is 65731702.

20713756 is an admirable number.

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, 369861 + ... + 369916.

Almost surely, 2^20713756 is an apocalyptic number.

It is an amenable number.

20713756 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.

20713756 is a wasteful number, since it uses less digits than its factorization.

20713756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739788 (or 739786 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 20713756 is about 4551.2367549931. The cubic root of 20713756 is about 274.6331460910.

The spelling of 20713756 in words is "twenty million, seven hundred thirteen thousand, seven hundred fifty-six".