18013370 has 48 divisors (see below), whose sum is σ = 36073728. Its totient is φ = 6462720.

The previous prime is 18013367. The next prime is 18013381. The reversal of 18013370 is 7331081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 23 ways as a sum of consecutive naturals, for example, 66335 + ... + 66605.

It is an arithmetic number, because the mean of its divisors is an integer number (751536).

Almost surely, 2^18013370 is an apocalyptic number.

18013370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18013370 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

18013370 is a wasteful number, since it uses less digits than its factorization.

18013370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 18013370 is about 4244.2160642456. The cubic root of 18013370 is about 262.1390109775.

The spelling of 18013370 in words is "eighteen million, thirteen thousand, three hundred seventy".