18315273957 has 8 divisors (see below), whose sum is σ = 25482120384. Its totient is φ = 11679305088.

The previous prime is 18315273941. The next prime is 18315273967. The reversal of 18315273957 is 75937251381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18315273957 - 2⁴ = 18315273941 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18315273917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132719308 + ... + 132719445.

It is an arithmetic number, because the mean of its divisors is an integer number (3185265048).

Almost surely, 2^18315273957 is an apocalyptic number.

It is an amenable number.

18315273957 is a deficient number, since it is larger than the sum of its proper divisors (7166846427).

18315273957 is a wasteful number, since it uses less digits than its factorization.

18315273957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265438779.

The product of its digits is 1587600, while the sum is 51.

The spelling of 18315273957 in words is "eighteen billion, three hundred fifteen million, two hundred seventy-three thousand, nine hundred fifty-seven".