20686473912 has 32 divisors (see below), whose sum is σ = 55694353680. Its totient is φ = 6365068800.

The previous prime is 20686473901. The next prime is 20686473943. The reversal of 20686473912 is 21937468602.

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 7 ways as a sum of consecutive naturals, for example, 33151089 + ... + 33151712.

Almost surely, 2^20686473912 is an apocalyptic number.

It is an amenable number.

20686473912 is an abundant number, since it is smaller than the sum of its proper divisors (35007879768).

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

20686473912 is a wasteful number, since it uses less digits than its factorization.

20686473912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66302823 (or 66302819 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 20686473912 in words is "twenty billion, six hundred eighty-six million, four hundred seventy-three thousand, nine hundred twelve".