18522479393 has 8 divisors (see below), whose sum is σ = 21084878016. Its totient is φ = 16106503600.

The previous prime is 18522479359. The next prime is 18522479453. The reversal of 18522479393 is 39397422581.

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

It is not a de Polignac number, because 18522479393 - 2¹⁶ = 18522413857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18522472393) 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, 36605438 + ... + 36605943.

It is an arithmetic number, because the mean of its divisors is an integer number (2635609752).

Almost surely, 2^18522479393 is an apocalyptic number.

It is an amenable number.

18522479393 is a deficient number, since it is larger than the sum of its proper divisors (2562398623).

18522479393 is a wasteful number, since it uses less digits than its factorization.

18522479393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73211415.

The product of its digits is 3265920, while the sum is 53.

The spelling of 18522479393 in words is "eighteen billion, five hundred twenty-two million, four hundred seventy-nine thousand, three hundred ninety-three".