18868830 has 32 divisors (see below), whose sum is σ = 46341504. Its totient is φ = 4914336.

The previous prime is 18868813. The next prime is 18868831. The reversal of 18868830 is 3886881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6024 + ... + 8603.

It is an arithmetic number, because the mean of its divisors is an integer number (1448172).

Almost surely, 2^18868830 is an apocalyptic number.

18868830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18868830 is an abundant number, since it is smaller than the sum of its proper divisors (27472674).

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

18868830 is a wasteful number, since it uses less digits than its factorization.

18868830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14680.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 18868830 is about 4343.8266539999. The cubic root of 18868830 is about 266.2246862574.

The spelling of 18868830 in words is "eighteen million, eight hundred sixty-eight thousand, eight hundred thirty".