18478585315 has 16 divisors (see below), whose sum is σ = 22494606336. Its totient is φ = 14569480800.

The previous prime is 18478585277. The next prime is 18478585331. The reversal of 18478585315 is 51358587481.

It is not a de Polignac number, because 18478585315 - 2⁷ = 18478585187 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221850 + ... + 1236880.

It is an arithmetic number, because the mean of its divisors is an integer number (1405912896).

Almost surely, 2^18478585315 is an apocalyptic number.

18478585315 is a deficient number, since it is larger than the sum of its proper divisors (4016021021).

18478585315 is a wasteful number, since it uses less digits than its factorization.

18478585315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18570.

The product of its digits is 5376000, while the sum is 55.

The spelling of 18478585315 in words is "eighteen billion, four hundred seventy-eight million, five hundred eighty-five thousand, three hundred fifteen".