18302144 has 28 divisors (see below), whose sum is σ = 41507664. Its totient is φ = 7843584.

The previous prime is 18302143. The next prime is 18302147. The reversal of 18302144 is 44120381.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (18302143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19979 + ... + 20874.

Almost surely, 2^18302144 is an apocalyptic number.

18302144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18302144 is an abundant number, since it is smaller than the sum of its proper divisors (23205520).

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

18302144 is an equidigital number, since it uses as much as digits as its factorization.

18302144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40872 (or 40862 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 18302144 is about 4278.1005130782. The cubic root of 18302144 is about 263.5323831073.

The spelling of 18302144 in words is "eighteen million, three hundred two thousand, one hundred forty-four".