18039154 has 12 divisors (see below), whose sum is σ = 31476654. Its totient is φ = 7731024.

The previous prime is 18039149. The next prime is 18039163. The reversal of 18039154 is 45193081.

It can be written as a sum of positive squares in only one way, i.e., 16769025 + 1270129 = 4095^2 + 1127^2 .

It is a super-2 number, since 2×18039154² = 650822154071432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91939 + ... + 92134.

Almost surely, 2^18039154 is an apocalyptic number.

18039154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18039154 is a deficient number, since it is larger than the sum of its proper divisors (13437500).

18039154 is a wasteful number, since it uses less digits than its factorization.

18039154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184089 (or 184082 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18039154 is about 4247.2525236911. The cubic root of 18039154 is about 262.2640249703.

The spelling of 18039154 in words is "eighteen million, thirty-nine thousand, one hundred fifty-four".