20718307926 has 16 divisors (see below), whose sum is σ = 46040684400. Its totient is φ = 6906102624.

The previous prime is 20718307913. The next prime is 20718307969. The reversal of 20718307926 is 62970381702.

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, 191836131 + ... + 191836238.

It is an arithmetic number, because the mean of its divisors is an integer number (2877542775).

Almost surely, 2^20718307926 is an apocalyptic number.

20718307926 is an abundant number, since it is smaller than the sum of its proper divisors (25322376474).

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

20718307926 is a wasteful number, since it uses less digits than its factorization.

20718307926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383672380 (or 383672374 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 20718307926 in words is "twenty billion, seven hundred eighteen million, three hundred seven thousand, nine hundred twenty-six".