18814433938 has 8 divisors (see below), whose sum is σ = 28260904320. Its totient is φ = 9394132500.

The previous prime is 18814433933. The next prime is 18814433971. The reversal of 18814433938 is 83933441881.

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

It is not an unprimeable number, because it can be changed into a prime (18814433933) 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 3 ways as a sum of consecutive naturals, for example, 6540438 + ... + 6543313.

It is an arithmetic number, because the mean of its divisors is an integer number (3532613040).

Almost surely, 2^18814433938 is an apocalyptic number.

18814433938 is a deficient number, since it is larger than the sum of its proper divisors (9446470382).

18814433938 is a wasteful number, since it uses less digits than its factorization.

18814433938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13084472.

The product of its digits is 1990656, while the sum is 52.

The spelling of 18814433938 in words is "eighteen billion, eight hundred fourteen million, four hundred thirty-three thousand, nine hundred thirty-eight".