18625980 has 24 divisors (see below), whose sum is σ = 52152912. Its totient is φ = 4966912.

The previous prime is 18625979. The next prime is 18625993. The reversal of 18625980 is 8952681.

It is a congruent number.

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, 155157 + ... + 155276.

It is an arithmetic number, because the mean of its divisors is an integer number (2173038).

Almost surely, 2^18625980 is an apocalyptic number.

18625980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18625980 is an abundant number, since it is smaller than the sum of its proper divisors (33526932).

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

18625980 is a wasteful number, since it uses less digits than its factorization.

18625980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310445 (or 310443 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 18625980 is about 4315.7826636660. The cubic root of 18625980 is about 265.0776086919.

The spelling of 18625980 in words is "eighteen million, six hundred twenty-five thousand, nine hundred eighty".