18390054 has 16 divisors (see below), whose sum is σ = 36843840. Its totient is φ = 6119400.

The previous prime is 18390049. The next prime is 18390067. The reversal of 18390054 is 45009381.

It is a super-2 number, since 2×18390054² = 676388172245832, which contains 22 as substring.

It is a congruent number.

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, 1629 + ... + 6279.

It is an arithmetic number, because the mean of its divisors is an integer number (2302740).

Almost surely, 2^18390054 is an apocalyptic number.

18390054 is an abundant number, since it is smaller than the sum of its proper divisors (18453786).

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

18390054 is a wasteful number, since it uses less digits than its factorization.

18390054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 18390054 is about 4288.3626245923. The cubic root of 18390054 is about 263.9536477390.

The spelling of 18390054 in words is "eighteen million, three hundred ninety thousand, fifty-four".