18047330 has 32 divisors (see below), whose sum is σ = 37290240. Its totient is φ = 6160320.

The previous prime is 18047303. The next prime is 18047347. The reversal of 18047330 is 3374081.

It is a super-2 number, since 2×18047330² = 651412240257800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18047330.

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, 21356 + ... + 22184.

It is an arithmetic number, because the mean of its divisors is an integer number (1165320).

Almost surely, 2^18047330 is an apocalyptic number.

18047330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18047330 is an abundant number, since it is smaller than the sum of its proper divisors (19242910).

18047330 is a wasteful number, since it uses less digits than its factorization.

18047330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 18047330 is about 4248.2149192337. The cubic root of 18047330 is about 262.3036415139.

The spelling of 18047330 in words is "eighteen million, forty-seven thousand, three hundred thirty".