18113700 has 108 divisors (see below), whose sum is σ = 57722000. Its totient is φ = 4382400.

The previous prime is 18113699. The next prime is 18113737. The reversal of 18113700 is 731181.

It is a super-2 number, since 2×18113700² = 656212255380000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 36051 + ... + 36549.

Almost surely, 2^18113700 is an apocalyptic number.

18113700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18113700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28861000).

18113700 is an abundant number, since it is smaller than the sum of its proper divisors (39608300).

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

18113700 is a wasteful number, since it uses less digits than its factorization.

18113700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 18113700 is about 4256.0192668737. The cubic root of 18113700 is about 262.6247932712.

Adding to 18113700 its reverse (731181), we get a palindrome (18844881).

The spelling of 18113700 in words is "eighteen million, one hundred thirteen thousand, seven hundred".