20390764926 has 32 divisors (see below), whose sum is σ = 49060488960. Its totient is φ = 5519304576.

The previous prime is 20390764913. The next prime is 20390764967. The reversal of 20390764926 is 62946709302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12775371 + ... + 12776966.

It is an arithmetic number, because the mean of its divisors is an integer number (1533140280).

Almost surely, 2^20390764926 is an apocalyptic number.

20390764926 is an abundant number, since it is smaller than the sum of its proper divisors (28669724034).

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

20390764926 is a wasteful number, since it uses less digits than its factorization.

20390764926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25552368.

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 20390764926 in words is "twenty billion, three hundred ninety million, seven hundred sixty-four thousand, nine hundred twenty-six".