18351115903 has 2 divisors, whose sum is σ = 18351115904. Its totient is φ = 18351115902.

The previous prime is 18351115897. The next prime is 18351116027. The reversal of 18351115903 is 30951115381.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18351115903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18351115603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175557951 + 9175557952.

It is an arithmetic number, because the mean of its divisors is an integer number (9175557952).

Almost surely, 2^18351115903 is an apocalyptic number.

18351115903 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351115903 is an equidigital number, since it uses as much as digits as its factorization.

18351115903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 37.

The spelling of 18351115903 in words is "eighteen billion, three hundred fifty-one million, one hundred fifteen thousand, nine hundred three".