18013516379 has 2 divisors, whose sum is σ = 18013516380. Its totient is φ = 18013516378.

The previous prime is 18013516327. The next prime is 18013516459. The reversal of 18013516379 is 97361531081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18013516379 - 2³² = 13718549083 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18013516309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006758189 + 9006758190.

It is an arithmetic number, because the mean of its divisors is an integer number (9006758190).

Almost surely, 2^18013516379 is an apocalyptic number.

18013516379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013516379 is an equidigital number, since it uses as much as digits as its factorization.

18013516379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 18013516379 in words is "eighteen billion, thirteen million, five hundred sixteen thousand, three hundred seventy-nine".