18013913399 has 2 divisors, whose sum is σ = 18013913400. Its totient is φ = 18013913398.

The previous prime is 18013913387. The next prime is 18013913429. The reversal of 18013913399 is 99331931081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18013913399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18013913339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006956699 + 9006956700.

It is an arithmetic number, because the mean of its divisors is an integer number (9006956700).

Almost surely, 2^18013913399 is an apocalyptic number.

18013913399 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013913399 is an equidigital number, since it uses as much as digits as its factorization.

18013913399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 47.

The spelling of 18013913399 in words is "eighteen billion, thirteen million, nine hundred thirteen thousand, three hundred ninety-nine".