18539236007 has 2 divisors, whose sum is σ = 18539236008. Its totient is φ = 18539236006.

The previous prime is 18539235941. The next prime is 18539236013. The reversal of 18539236007 is 70063293581.

It is a strong prime.

It is an emirp because it is prime and its reverse (70063293581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18539236007 - 2⁸ = 18539235751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18539236207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9269618003 + 9269618004.

It is an arithmetic number, because the mean of its divisors is an integer number (9269618004).

Almost surely, 2^18539236007 is an apocalyptic number.

18539236007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18539236007 is an equidigital number, since it uses as much as digits as its factorization.

18539236007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 18539236007 in words is "eighteen billion, five hundred thirty-nine million, two hundred thirty-six thousand, seven".