18572508997 has 8 divisors (see below), whose sum is σ = 21336855552. Its totient is φ = 15835945200.

The previous prime is 18572508991. The next prime is 18572509001. The reversal of 18572508997 is 79980527581.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18572508997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18572508991) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6944254 + ... + 6946927.

It is an arithmetic number, because the mean of its divisors is an integer number (2667106944).

Almost surely, 2^18572508997 is an apocalyptic number.

It is an amenable number.

18572508997 is a deficient number, since it is larger than the sum of its proper divisors (2764346555).

18572508997 is a wasteful number, since it uses less digits than its factorization.

18572508997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13891379.

The product of its (nonzero) digits is 12700800, while the sum is 61.

The spelling of 18572508997 in words is "eighteen billion, five hundred seventy-two million, five hundred eight thousand, nine hundred ninety-seven".