18838840736 has 24 divisors (see below), whose sum is σ = 38701533024. Its totient is φ = 9009880000.

The previous prime is 18838840729. The next prime is 18838840739. The reversal of 18838840736 is 63704883881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18838840739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12797390 + ... + 12798861.

It is an arithmetic number, because the mean of its divisors is an integer number (1612563876).

Almost surely, 2^18838840736 is an apocalyptic number.

18838840736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18838840736 is an abundant number, since it is smaller than the sum of its proper divisors (19862692288).

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

18838840736 is a wasteful number, since it uses less digits than its factorization.

18838840736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25596284 (or 25596276 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 18838840736 in words is "eighteen billion, eight hundred thirty-eight million, eight hundred forty thousand, seven hundred thirty-six".