17994236720 has 40 divisors (see below), whose sum is σ = 41843103120. Its totient is φ = 7196576000.

The previous prime is 17994236671. The next prime is 17994236731. The reversal of 17994236720 is 2763249971.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666851 + ... + 693309.

It is an arithmetic number, because the mean of its divisors is an integer number (1046077578).

Almost surely, 2^17994236720 is an apocalyptic number.

17994236720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17994236720 is an abundant number, since it is smaller than the sum of its proper divisors (23848866400).

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

17994236720 is a wasteful number, since it uses less digits than its factorization.

17994236720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34973 (or 34967 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 50.

The spelling of 17994236720 in words is "seventeen billion, nine hundred ninety-four million, two hundred thirty-six thousand, seven hundred twenty".