18002912539 has 2 divisors, whose sum is σ = 18002912540. Its totient is φ = 18002912538.

The previous prime is 18002912497. The next prime is 18002912561. The reversal of 18002912539 is 93521920081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18002912539 - 2²¹ = 18000815387 is a prime.

It is not a weakly prime, because it can be changed into another prime (18002912339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9001456269 + 9001456270.

It is an arithmetic number, because the mean of its divisors is an integer number (9001456270).

Almost surely, 2^18002912539 is an apocalyptic number.

18002912539 is a deficient number, since it is larger than the sum of its proper divisors (1).

18002912539 is an equidigital number, since it uses as much as digits as its factorization.

18002912539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 18002912539 in words is "eighteen billion, two million, nine hundred twelve thousand, five hundred thirty-nine".