18915113411 has 2 divisors, whose sum is σ = 18915113412. Its totient is φ = 18915113410.

The previous prime is 18915113341. The next prime is 18915113423. The reversal of 18915113411 is 11431151981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18915113411 is a prime.

It is not a weakly prime, because it can be changed into another prime (18915163411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9457556705 + 9457556706.

It is an arithmetic number, because the mean of its divisors is an integer number (9457556706).

Almost surely, 2^18915113411 is an apocalyptic number.

18915113411 is a deficient number, since it is larger than the sum of its proper divisors (1).

18915113411 is an equidigital number, since it uses as much as digits as its factorization.

18915113411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 35.

The spelling of 18915113411 in words is "eighteen billion, nine hundred fifteen million, one hundred thirteen thousand, four hundred eleven".