18325780 has 24 divisors (see below), whose sum is σ = 41983200. Its totient is φ = 6663840.

The previous prime is 18325777. The next prime is 18325781. The reversal of 18325780 is 8752381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18325781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41430 + ... + 41869.

It is an arithmetic number, because the mean of its divisors is an integer number (1749300).

Almost surely, 2^18325780 is an apocalyptic number.

18325780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18325780 is an abundant number, since it is smaller than the sum of its proper divisors (23657420).

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

18325780 is a wasteful number, since it uses less digits than its factorization.

18325780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83319 (or 83317 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 18325780 is about 4280.8620627159. The cubic root of 18325780 is about 263.6457791470.

The spelling of 18325780 in words is "eighteen million, three hundred twenty-five thousand, seven hundred eighty".