20686822680 has 64 divisors (see below), whose sum is σ = 62074136160. Its totient is φ = 5515271168.

The previous prime is 20686822621. The next prime is 20686822711. The reversal of 20686822680 is 8622868602.

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, 616414 + ... + 649106.

Almost surely, 2^20686822680 is an apocalyptic number.

20686822680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20686822680 is an abundant number, since it is smaller than the sum of its proper divisors (41387313480).

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

20686822680 is a wasteful number, since it uses less digits than its factorization.

20686822680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37980 (or 37976 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 20686822680 in words is "twenty billion, six hundred eighty-six million, eight hundred twenty-two thousand, six hundred eighty".