18267906980 has 24 divisors (see below), whose sum is σ = 38378423160. Its totient is φ = 7304149760.

The previous prime is 18267906967. The next prime is 18267906997. The reversal of 18267906980 is 8960976281.

It can be written as a sum of positive squares in 4 ways, for example, as 1079648164 + 17188258816 = 32858^2 + 131104^2 .

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, 138275 + ... + 235914.

It is an arithmetic number, because the mean of its divisors is an integer number (1599100965).

Almost surely, 2^18267906980 is an apocalyptic number.

18267906980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18267906980 is an abundant number, since it is smaller than the sum of its proper divisors (20110516180).

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

18267906980 is a wasteful number, since it uses less digits than its factorization.

18267906980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376639 (or 376637 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 18267906980 in words is "eighteen billion, two hundred sixty-seven million, nine hundred six thousand, nine hundred eighty".