18823232394 has 24 divisors (see below), whose sum is σ = 40912337700. Its totient is φ = 6254615808.

The previous prime is 18823232359. The next prime is 18823232423. The reversal of 18823232394 is 49323232881.

18823232394 is a `hidden beast` number, since 1 + 8 + 8 + 23 + 232 + 394 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18697007169 + 126225225 = 136737^2 + 11235^2 .

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1643719 + ... + 1655130.

Almost surely, 2^18823232394 is an apocalyptic number.

18823232394 is an abundant number, since it is smaller than the sum of its proper divisors (22089105306).

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

18823232394 is a wasteful number, since it uses less digits than its factorization.

18823232394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299174 (or 3299171 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 18823232394 in words is "eighteen billion, eight hundred twenty-three million, two hundred thirty-two thousand, three hundred ninety-four".