18396780 has 48 divisors (see below), whose sum is σ = 53754624. Its totient is φ = 4692160.

The previous prime is 18396779. The next prime is 18396811. The reversal of 18396780 is 8769381.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5286 + ... + 8045.

It is an arithmetic number, because the mean of its divisors is an integer number (1119888).

Almost surely, 2^18396780 is an apocalyptic number.

18396780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18396780 is an abundant number, since it is smaller than the sum of its proper divisors (35357844).

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

18396780 is a wasteful number, since it uses less digits than its factorization.

18396780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13366 (or 13364 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 18396780 is about 4289.1467682979. The cubic root of 18396780 is about 263.9858233893.

The spelling of 18396780 in words is "eighteen million, three hundred ninety-six thousand, seven hundred eighty".