20872106180 has 24 divisors (see below), whose sum is σ = 44151366168. Its totient is φ = 8287900928.

The previous prime is 20872106173. The next prime is 20872106221. The reversal of 20872106180 is 8160127802.

It can be written as a sum of positive squares in 4 ways, for example, as 9314566144 + 11557540036 = 96512^2 + 107506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20872106180.

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, 3806039 + ... + 3811518.

It is an arithmetic number, because the mean of its divisors is an integer number (1839640257).

Almost surely, 2^20872106180 is an apocalyptic number.

20872106180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20872106180 is an abundant number, since it is smaller than the sum of its proper divisors (23279259988).

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

20872106180 is a wasteful number, since it uses less digits than its factorization.

20872106180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7617703 (or 7617701 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The spelling of 20872106180 in words is "twenty billion, eight hundred seventy-two million, one hundred six thousand, one hundred eighty".