18112730 has 32 divisors (see below), whose sum is σ = 34604928. Its totient is φ = 6811200.

The previous prime is 18112727. The next prime is 18112741. The reversal of 18112730 is 3721181.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 18112696 and 18112705.

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, 13385 + ... + 14675.

It is an arithmetic number, because the mean of its divisors is an integer number (1081404).

Almost surely, 2^18112730 is an apocalyptic number.

18112730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18112730 is a deficient number, since it is larger than the sum of its proper divisors (16492198).

18112730 is a wasteful number, since it uses less digits than its factorization.

18112730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 18112730 is about 4255.9053090970. The cubic root of 18112730 is about 262.6201052801.

The spelling of 18112730 in words is "eighteen million, one hundred twelve thousand, seven hundred thirty".