18338870 has 32 divisors (see below), whose sum is σ = 36197280. Its totient is φ = 6634240.

The previous prime is 18338867. The next prime is 18338921. The reversal of 18338870 is 7883381.

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 15 ways as a sum of consecutive naturals, for example, 31946 + ... + 32514.

It is an arithmetic number, because the mean of its divisors is an integer number (1131165).

Almost surely, 2^18338870 is an apocalyptic number.

18338870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18338870 is a deficient number, since it is larger than the sum of its proper divisors (17858410).

18338870 is a wasteful number, since it uses less digits than its factorization.

18338870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 18338870 is about 4282.3906874548. The cubic root of 18338870 is about 263.7085377648.

The spelling of 18338870 in words is "eighteen million, three hundred thirty-eight thousand, eight hundred seventy".