18668190 has 64 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 4777344.

The previous prime is 18668179. The next prime is 18668197. The reversal of 18668190 is 9186681.

It is a super-2 number, since 2×18668190² = 697002635752200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93711 + ... + 93909.

It is an arithmetic number, because the mean of its divisors is an integer number (729000).

Almost surely, 2^18668190 is an apocalyptic number.

18668190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18668190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23328000).

18668190 is an abundant number, since it is smaller than the sum of its proper divisors (27987810).

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

18668190 is a wasteful number, since it uses less digits than its factorization.

18668190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 18668190 is about 4320.6700869194. The cubic root of 18668190 is about 265.2776963188.

The spelling of 18668190 in words is "eighteen million, six hundred sixty-eight thousand, one hundred ninety".