17994915936 has 192 divisors, whose sum is σ = 53350315200. Its totient is φ = 5973834240.

The previous prime is 17994915919. The next prime is 17994915977. The reversal of 17994915936 is 63951949971.

17994915936 is a `hidden beast` number, since 1 + 7 + 99 + 491 + 59 + 3 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27223446 + ... + 27224106.

It is an arithmetic number, because the mean of its divisors is an integer number (277866225).

Almost surely, 2^17994915936 is an apocalyptic number.

17994915936 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 17994915936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26675157600).

17994915936 is an abundant number, since it is smaller than the sum of its proper divisors (35355399264).

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

17994915936 is an frugal number, since it uses more digits than its factorization.

17994915936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1055 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 63.

The spelling of 17994915936 in words is "seventeen billion, nine hundred ninety-four million, nine hundred fifteen thousand, nine hundred thirty-six".