18353372019 has 8 divisors (see below), whose sum is σ = 24991825920. Its totient is φ = 11975249736.

The previous prime is 18353372017. The next prime is 18353372047. The reversal of 18353372019 is 91027335381.

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

It is not a de Polignac number, because 18353372019 - 2¹ = 18353372017 is a prime.

It is a super-2 number, since 2×18353372019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18353372017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65082739 + ... + 65083020.

It is an arithmetic number, because the mean of its divisors is an integer number (3123978240).

Almost surely, 2^18353372019 is an apocalyptic number.

18353372019 is a deficient number, since it is larger than the sum of its proper divisors (6638453901).

18353372019 is a wasteful number, since it uses less digits than its factorization.

18353372019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130165809.

The product of its (nonzero) digits is 136080, while the sum is 42.

It can be divided in two parts, 183533 and 72019, that added together give a palindrome (255552).

The spelling of 18353372019 in words is "eighteen billion, three hundred fifty-three million, three hundred seventy-two thousand, nineteen".