18843947936 has 24 divisors (see below), whose sum is σ = 40471661664. Its totient is φ = 8565430720.

The previous prime is 18843947923. The next prime is 18843947939. The reversal of 18843947936 is 63974934881.

It is not an unprimeable number, because it can be changed into a prime (18843947939) 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, 26766620 + ... + 26767323.

It is an arithmetic number, because the mean of its divisors is an integer number (1686319236).

Almost surely, 2^18843947936 is an apocalyptic number.

18843947936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18843947936 is an abundant number, since it is smaller than the sum of its proper divisors (21627713728).

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

18843947936 is a wasteful number, since it uses less digits than its factorization.

18843947936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53533964 (or 53533956 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 62.

The spelling of 18843947936 in words is "eighteen billion, eight hundred forty-three million, nine hundred forty-seven thousand, nine hundred thirty-six".