18413683968 has 144 divisors (see below), whose sum is σ = 49912027200. Its totient is φ = 6025248768.

The previous prime is 18413683961. The next prime is 18413683973. The reversal of 18413683968 is 86938631481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18413683961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23103346 + ... + 23104142.

It is an arithmetic number, because the mean of its divisors is an integer number (346611300).

Almost surely, 2^18413683968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18413683968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24956013600).

18413683968 is an abundant number, since it is smaller than the sum of its proper divisors (31498343232).

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

18413683968 is an equidigital number, since it uses as much as digits as its factorization.

18413683968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1318 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The spelling of 18413683968 in words is "eighteen billion, four hundred thirteen million, six hundred eighty-three thousand, nine hundred sixty-eight".