18456309315 has 48 divisors (see below), whose sum is σ = 32457341280. Its totient is φ = 9700093440.

The previous prime is 18456309271. The next prime is 18456309329. The reversal of 18456309315 is 51390365481.

18456309315 is a `hidden beast` number, since 1 + 8 + 4 + 5 + 630 + 9 + 3 + 1 + 5 = 666.

It is a Cunningham number, because it is equal to 135854²-1.

It is not a de Polignac number, because 18456309315 - 2⁹ = 18456308803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6111876 + ... + 6114894.

It is an arithmetic number, because the mean of its divisors is an integer number (676194610).

Almost surely, 2^18456309315 is an apocalyptic number.

18456309315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18456309315 is a deficient number, since it is larger than the sum of its proper divisors (14001031965).

18456309315 is a wasteful number, since it uses less digits than its factorization.

18456309315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964 (or 4961 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 18456309315 in words is "eighteen billion, four hundred fifty-six million, three hundred nine thousand, three hundred fifteen".