18255980 has 12 divisors (see below), whose sum is σ = 38337600. Its totient is φ = 7302384.

The previous prime is 18255973. The next prime is 18255989. The reversal of 18255980 is 8955281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18255989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456380 + ... + 456419.

It is an arithmetic number, because the mean of its divisors is an integer number (3194800).

Almost surely, 2^18255980 is an apocalyptic number.

18255980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18255980 is an abundant number, since it is smaller than the sum of its proper divisors (20081620).

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

18255980 is a wasteful number, since it uses less digits than its factorization.

18255980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912808 (or 912806 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 18255980 is about 4272.7017213936. The cubic root of 18255980 is about 263.3106249000.

The spelling of 18255980 in words is "eighteen million, two hundred fifty-five thousand, nine hundred eighty".