18351115945 has 16 divisors (see below), whose sum is σ = 22115427840. Its totient is φ = 14618232000.

The previous prime is 18351115903. The next prime is 18351116027. The reversal of 18351115945 is 54951115381.

It is not a de Polignac number, because 18351115945 - 2¹⁹ = 18350591657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3453951 + ... + 3459259.

It is an arithmetic number, because the mean of its divisors is an integer number (1382214240).

Almost surely, 2^18351115945 is an apocalyptic number.

It is an amenable number.

18351115945 is a deficient number, since it is larger than the sum of its proper divisors (3764311895).

18351115945 is a wasteful number, since it uses less digits than its factorization.

18351115945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8136.

The product of its digits is 108000, while the sum is 43.

The spelling of 18351115945 in words is "eighteen billion, three hundred fifty-one million, one hundred fifteen thousand, nine hundred forty-five".