20866673968 has 20 divisors (see below), whose sum is σ = 46204778320. Its totient is φ = 8942860224.

The previous prime is 20866673951. The next prime is 20866673983. The reversal of 20866673968 is 86937666802.

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, 93154683 + ... + 93154906.

It is an arithmetic number, because the mean of its divisors is an integer number (2310238916).

Almost surely, 2^20866673968 is an apocalyptic number.

20866673968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20866673968 is an abundant number, since it is smaller than the sum of its proper divisors (25338104352).

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

20866673968 is a wasteful number, since it uses less digits than its factorization.

20866673968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186309604 (or 186309598 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 20866673968 in words is "twenty billion, eight hundred sixty-six million, six hundred seventy-three thousand, nine hundred sixty-eight".