102072979820 has 24 divisors (see below), whose sum is σ = 244975151904. Its totient is φ = 34996450176.

The previous prime is 102072979819. The next prime is 102072979889. The reversal of 102072979820 is 28979270201.

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, 364546217 + ... + 364546496.

It is an arithmetic number, because the mean of its divisors is an integer number (10207297996).

Almost surely, 2^102072979820 is an apocalyptic number.

102072979820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102072979820 is an abundant number, since it is smaller than the sum of its proper divisors (142902172084).

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

102072979820 is a wasteful number, since it uses less digits than its factorization.

102072979820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729092729 (or 729092727 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 102072979820 in words is "one hundred two billion, seventy-two million, nine hundred seventy-nine thousand, eight hundred twenty".