20371703664 has 40 divisors (see below), whose sum is σ = 56675126032. Its totient is φ = 6268216320.

The previous prime is 20371703647. The next prime is 20371703699. The reversal of 20371703664 is 46630717302.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 16322857 + ... + 16324104.

Almost surely, 2^20371703664 is an apocalyptic number.

20371703664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20371703664 is an abundant number, since it is smaller than the sum of its proper divisors (36303422368).

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

20371703664 is a wasteful number, since it uses less digits than its factorization.

20371703664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32646985 (or 32646979 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 39.

The spelling of 20371703664 in words is "twenty billion, three hundred seventy-one million, seven hundred three thousand, six hundred sixty-four".