18114820 has 24 divisors (see below), whose sum is σ = 38130624. Its totient is φ = 7228896.

The previous prime is 18114797. The next prime is 18114841. The reversal of 18114820 is 2841181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10969 + ... + 12511.

It is an arithmetic number, because the mean of its divisors is an integer number (1588776).

Almost surely, 2^18114820 is an apocalyptic number.

18114820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18114820 is an abundant number, since it is smaller than the sum of its proper divisors (20015804).

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

18114820 is a wasteful number, since it uses less digits than its factorization.

18114820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 18114820 is about 4256.1508431915. The cubic root of 18114820 is about 262.6302060013.

The spelling of 18114820 in words is "eighteen million, one hundred fourteen thousand, eight hundred twenty".