18384057 has 32 divisors (see below), whose sum is σ = 28771200. Its totient is φ = 11583936.

The previous prime is 18384043. The next prime is 18384059. The reversal of 18384057 is 75048381.

It is not a de Polignac number, because 18384057 - 2⁸ = 18383801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18384059) 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, 41278 + ... + 41720.

It is an arithmetic number, because the mean of its divisors is an integer number (899100).

Almost surely, 2^18384057 is an apocalyptic number.

It is an amenable number.

18384057 is a deficient number, since it is larger than the sum of its proper divisors (10387143).

18384057 is a wasteful number, since it uses less digits than its factorization.

18384057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 18384057 is about 4287.6633496579. The cubic root of 18384057 is about 263.9249528420.

The spelling of 18384057 in words is "eighteen million, three hundred eighty-four thousand, fifty-seven".