20713993976 has 16 divisors (see below), whose sum is σ = 41826334200. Its totient is φ = 9560304864.

The previous prime is 20713993973. The next prime is 20713993981. The reversal of 20713993976 is 67939931702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20713993973) 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 3 ways as a sum of consecutive naturals, for example, 99586406 + ... + 99586613.

Almost surely, 2^20713993976 is an apocalyptic number.

20713993976 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20713993976 is an abundant number, since it is smaller than the sum of its proper divisors (21112340224).

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

20713993976 is a wasteful number, since it uses less digits than its factorization.

20713993976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199173038 (or 199173034 counting only the distinct ones).

The product of its (nonzero) digits is 3857868, while the sum is 56.

The spelling of 20713993976 in words is "twenty billion, seven hundred thirteen million, nine hundred ninety-three thousand, nine hundred seventy-six".