18378295936 has 384 divisors, whose sum is σ = 51728785920. Its totient is φ = 6386688000.

The previous prime is 18378295921. The next prime is 18378295963. The reversal of 18378295936 is 63959287381.

It is a super-2 number, since 2×18378295936² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27803446 + ... + 27804106.

It is an arithmetic number, because the mean of its divisors is an integer number (134710380).

Almost surely, 2^18378295936 is an apocalyptic number.

18378295936 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 18378295936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25864392960).

18378295936 is an abundant number, since it is smaller than the sum of its proper divisors (33350489984).

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

18378295936 is a wasteful number, since it uses less digits than its factorization.

18378295936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 725 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 61.

The spelling of 18378295936 in words is "eighteen billion, three hundred seventy-eight million, two hundred ninety-five thousand, nine hundred thirty-six".