20397907804 has 12 divisors (see below), whose sum is σ = 35698545064. Its totient is φ = 10198323504.

The previous prime is 20397907781. The next prime is 20397907813. The reversal of 20397907804 is 40870979302.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 80619 + ... + 217474.

Almost surely, 2^20397907804 is an apocalyptic number.

It is an amenable number.

20397907804 is a deficient number, since it is larger than the sum of its proper divisors (15300637260).

20397907804 is a wasteful number, since it uses less digits than its factorization.

20397907804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315204 (or 315202 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 20397907804 in words is "twenty billion, three hundred ninety-seven million, nine hundred seven thousand, eight hundred four".