20693404928 has 36 divisors (see below), whose sum is σ = 47206834080. Its totient is φ = 8868601344.

The previous prime is 20693404909. The next prime is 20693404931. The reversal of 20693404928 is 82940439602.

It is a hoax number, since the sum of its digits (47) 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5772038 + ... + 5775621.

Almost surely, 2^20693404928 is an apocalyptic number.

20693404928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20693404928 is an abundant number, since it is smaller than the sum of its proper divisors (26513429152).

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

20693404928 is an equidigital number, since it uses as much as digits as its factorization.

20693404928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11547682 (or 11547668 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 20693404928 in words is "twenty billion, six hundred ninety-three million, four hundred four thousand, nine hundred twenty-eight".