18047039 has 2 divisors, whose sum is σ = 18047040. Its totient is φ = 18047038.

The previous prime is 18047027. The next prime is 18047059. The reversal of 18047039 is 93074081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18047039 - 2⁴ = 18047023 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18046996 and 18047014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18047059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9023519 + 9023520.

It is an arithmetic number, because the mean of its divisors is an integer number (9023520).

Almost surely, 2^18047039 is an apocalyptic number.

18047039 is a deficient number, since it is larger than the sum of its proper divisors (1).

18047039 is an equidigital number, since it uses as much as digits as its factorization.

18047039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 18047039 is about 4248.1806694160. The cubic root of 18047039 is about 262.3022316882.

The spelling of 18047039 in words is "eighteen million, forty-seven thousand, thirty-nine".