18868330 has 32 divisors (see below), whose sum is σ = 38505600. Its totient is φ = 6599232.

The previous prime is 18868309. The next prime is 18868361. The reversal of 18868330 is 3386881.

It is a self number, because there is not a number n which added to its sum of digits gives 18868330.

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, 1350 + ... + 6289.

It is an arithmetic number, because the mean of its divisors is an integer number (1203300).

Almost surely, 2^18868330 is an apocalyptic number.

18868330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18868330 is an abundant number, since it is smaller than the sum of its proper divisors (19637270).

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

18868330 is a wasteful number, since it uses less digits than its factorization.

18868330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18868330 is about 4343.7691006774. The cubic root of 18868330 is about 266.2223346981. Note that the first 3 decimals are identical.

The spelling of 18868330 in words is "eighteen million, eight hundred sixty-eight thousand, three hundred thirty".