18166054 has 4 divisors (see below), whose sum is σ = 27249084. Its totient is φ = 9083026.

The previous prime is 18166051. The next prime is 18166061. The reversal of 18166054 is 45066181.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18166051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4541512 + ... + 4541515.

It is an arithmetic number, because the mean of its divisors is an integer number (6812271).

Almost surely, 2^18166054 is an apocalyptic number.

18166054 is a deficient number, since it is larger than the sum of its proper divisors (9083030).

18166054 is an equidigital number, since it uses as much as digits as its factorization.

18166054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9083029.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18166054 is about 4262.1654120881. The cubic root of 18166054 is about 262.8775712418.

The spelling of 18166054 in words is "eighteen million, one hundred sixty-six thousand, fifty-four".