18408807936 has 120 divisors (see below), whose sum is σ = 53457192360. Its totient is φ = 6098374656.

The previous prime is 18408807929. The next prime is 18408807941. The reversal of 18408807936 is 63970880481.

It is a super-3 number, since 3×18408807936³ (a number of 32 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 738850 + ... + 763358.

It is an arithmetic number, because the mean of its divisors is an integer number (445476603).

Almost surely, 2^18408807936 is an apocalyptic number.

18408807936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18408807936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26728596180).

18408807936 is an abundant number, since it is smaller than the sum of its proper divisors (35048384424).

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

18408807936 is a wasteful number, since it uses less digits than its factorization.

18408807936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24696 (or 24677 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 18408807936 in words is "eighteen billion, four hundred eight million, eight hundred seven thousand, nine hundred thirty-six".