18972195810 has 32 divisors (see below), whose sum is σ = 45626041152. Its totient is φ = 5048944320.

The previous prime is 18972195793. The next prime is 18972195811. The reversal of 18972195810 is 1859127981.

It is a super-2 number, since 2×18972195810² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18972195811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629269 + ... + 658728.

It is an arithmetic number, because the mean of its divisors is an integer number (1425813786).

Almost surely, 2^18972195810 is an apocalyptic number.

18972195810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18972195810 is an abundant number, since it is smaller than the sum of its proper divisors (26653845342).

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

18972195810 is a wasteful number, since it uses less digits than its factorization.

18972195810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288498.

The product of its (nonzero) digits is 362880, while the sum is 51.

The spelling of 18972195810 in words is "eighteen billion, nine hundred seventy-two million, one hundred ninety-five thousand, eight hundred ten".