18334139 has 2 divisors, whose sum is σ = 18334140. Its totient is φ = 18334138.

The previous prime is 18334133. The next prime is 18334153. The reversal of 18334139 is 93143381.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18334139 - 2⁸ = 18333883 is a prime.

It is a super-2 number, since 2×18334139² = 672281305742642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18334133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167069 + 9167070.

It is an arithmetic number, because the mean of its divisors is an integer number (9167070).

Almost surely, 2^18334139 is an apocalyptic number.

18334139 is a deficient number, since it is larger than the sum of its proper divisors (1).

18334139 is an equidigital number, since it uses as much as digits as its factorization.

18334139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 18334139 is about 4281.8382734522. The cubic root of 18334139 is about 263.6858589340.

The spelling of 18334139 in words is "eighteen million, three hundred thirty-four thousand, one hundred thirty-nine".