18313700 has 36 divisors (see below), whose sum is σ = 40674480. Its totient is φ = 7153440.

The previous prime is 18313693. The next prime is 18313717. The reversal of 18313700 is 731381.

It is a happy 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 11 ways as a sum of consecutive naturals, for example, 2171 + ... + 6429.

Almost surely, 2^18313700 is an apocalyptic number.

18313700 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 18313700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20337240).

18313700 is an abundant number, since it is smaller than the sum of its proper divisors (22360780).

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

18313700 is a wasteful number, since it uses less digits than its factorization.

18313700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316 (or 4309 counting only the distinct ones).

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

The square root of 18313700 is about 4279.4508993561. The cubic root of 18313700 is about 263.5878363462.

The spelling of 18313700 in words is "eighteen million, three hundred thirteen thousand, seven hundred".