18442507099 has 2 divisors, whose sum is σ = 18442507100. Its totient is φ = 18442507098.

The previous prime is 18442507093. The next prime is 18442507129. The reversal of 18442507099 is 99070524481.

It is a weak prime.

It is an emirp because it is prime and its reverse (99070524481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18442507099 - 2⁵ = 18442507067 is a prime.

It is not a weakly prime, because it can be changed into another prime (18442507093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9221253549 + 9221253550.

It is an arithmetic number, because the mean of its divisors is an integer number (9221253550).

Almost surely, 2^18442507099 is an apocalyptic number.

18442507099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18442507099 is an equidigital number, since it uses as much as digits as its factorization.

18442507099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 18442507099 in words is "eighteen billion, four hundred forty-two million, five hundred seven thousand, ninety-nine".