16500017994 has 16 divisors (see below), whose sum is σ = 33012658080. Its totient is φ = 5497902320.

The previous prime is 16500017971. The next prime is 16500018023. The reversal of 16500017994 is 49971000561.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508884 + ... + 540335.

It is an arithmetic number, because the mean of its divisors is an integer number (2063291130).

Almost surely, 2^16500017994 is an apocalyptic number.

16500017994 is an abundant number, since it is smaller than the sum of its proper divisors (16512640086).

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

16500017994 is a wasteful number, since it uses less digits than its factorization.

16500017994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051845.

The product of its (nonzero) digits is 68040, while the sum is 42.

The spelling of 16500017994 in words is "sixteen billion, five hundred million, seventeen thousand, nine hundred ninety-four".