18132813515 has 16 divisors (see below), whose sum is σ = 22182768000. Its totient is φ = 14226456192.

The previous prime is 18132813487. The next prime is 18132813541. The reversal of 18132813515 is 51531823181.

It is a cyclic number.

It is not a de Polignac number, because 18132813515 - 2⁶ = 18132813451 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95192 + ... + 212901.

It is an arithmetic number, because the mean of its divisors is an integer number (1386423000).

Almost surely, 2^18132813515 is an apocalyptic number.

18132813515 is a deficient number, since it is larger than the sum of its proper divisors (4049954485).

18132813515 is a wasteful number, since it uses less digits than its factorization.

18132813515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308326.

The product of its digits is 28800, while the sum is 38.

The spelling of 18132813515 in words is "eighteen billion, one hundred thirty-two million, eight hundred thirteen thousand, five hundred fifteen".