18522918 has 24 divisors (see below), whose sum is σ = 41620488. Its totient is φ = 6174144.

The previous prime is 18522913. The next prime is 18522919. The reversal of 18522918 is 81922581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18522913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18571 + ... + 19542.

It is an arithmetic number, because the mean of its divisors is an integer number (1734187).

Almost surely, 2^18522918 is an apocalyptic number.

18522918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18522918 is an abundant number, since it is smaller than the sum of its proper divisors (23097570).

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

18522918 is an equidigital number, since it uses as much as digits as its factorization.

18522918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38130 (or 38118 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 18522918 is about 4303.8259723181. The cubic root of 18522918 is about 264.5877915604.

It can be divided in two parts, 18522 and 918, that multiplied together give a triangular number (17003196 = T₅₈₃₁).

The spelling of 18522918 in words is "eighteen million, five hundred twenty-two thousand, nine hundred eighteen".