20686704478224 has 40 divisors (see below), whose sum is σ = 53535574536672. Its totient is φ = 6883320249600.

The previous prime is 20686704478213. The next prime is 20686704478277. The reversal of 20686704478224 is 42287440768602.

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, 382719877 + ... + 382773924.

Almost surely, 2^{20686704478224} is an apocalyptic number.

20686704478224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20686704478224 is an abundant number, since it is smaller than the sum of its proper divisors (32848870058448).

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

20686704478224 is a wasteful number, since it uses less digits than its factorization.

20686704478224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765494375 (or 765494369 counting only the distinct ones).

The product of its (nonzero) digits is 57802752, while the sum is 60.

The spelling of 20686704478224 in words is "twenty trillion, six hundred eighty-six billion, seven hundred four million, four hundred seventy-eight thousand, two hundred twenty-four".