18668533371 has 8 divisors (see below), whose sum is σ = 25206458880. Its totient is φ = 12288148392.

The previous prime is 18668533361. The next prime is 18668533397. The reversal of 18668533371 is 17333586681.

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

It is not a de Polignac number, because 18668533371 - 2⁶ = 18668533307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18668533361) 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, 39384855 + ... + 39385328.

It is an arithmetic number, because the mean of its divisors is an integer number (3150807360).

Almost surely, 2^18668533371 is an apocalyptic number.

18668533371 is a deficient number, since it is larger than the sum of its proper divisors (6537925509).

18668533371 is an equidigital number, since it uses as much as digits as its factorization.

18668533371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78770265.

The product of its digits is 2177280, while the sum is 51.

The spelling of 18668533371 in words is "eighteen billion, six hundred sixty-eight million, five hundred thirty-three thousand, three hundred seventy-one".