18947332326 has 16 divisors (see below), whose sum is σ = 40809639024. Its totient is φ = 5829948384.

The previous prime is 18947332321. The next prime is 18947332343. The reversal of 18947332326 is 62323374981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18947332321) 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, 121457181 + ... + 121457336.

It is an arithmetic number, because the mean of its divisors is an integer number (2550602439).

Almost surely, 2^18947332326 is an apocalyptic number.

18947332326 is an abundant number, since it is smaller than the sum of its proper divisors (21862306698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18947332326 is a wasteful number, since it uses less digits than its factorization.

18947332326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242914535.

The product of its digits is 1306368, while the sum is 48.

The spelling of 18947332326 in words is "eighteen billion, nine hundred forty-seven million, three hundred thirty-two thousand, three hundred twenty-six".