18082520 has 32 divisors (see below), whose sum is σ = 40867200. Its totient is φ = 7200768.

The previous prime is 18082511. The next prime is 18082541. The reversal of 18082520 is 2528081.

It is a self number, because there is not a number n which added to its sum of digits gives 18082520.

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, 9401 + ... + 11159.

It is an arithmetic number, because the mean of its divisors is an integer number (1277100).

Almost surely, 2^18082520 is an apocalyptic number.

18082520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18082520 is an abundant number, since it is smaller than the sum of its proper divisors (22784680).

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

18082520 is a wasteful number, since it uses less digits than its factorization.

18082520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2023 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 18082520 is about 4252.3546418426. The cubic root of 18082520 is about 262.4740170805.

The spelling of 18082520 in words is "eighteen million, eighty-two thousand, five hundred twenty".