16994331919 has 4 divisors (see below), whose sum is σ = 17013492144. Its totient is φ = 16975171696.

The previous prime is 16994331917. The next prime is 16994331961. The reversal of 16994331919 is 91913349961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16994331919 - 2¹ = 16994331917 is a prime.

It is a super-2 number, since 2×16994331919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16994331919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16994331917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9578782 + ... + 9580555.

It is an arithmetic number, because the mean of its divisors is an integer number (4253373036).

Almost surely, 2^16994331919 is an apocalyptic number.

16994331919 is a deficient number, since it is larger than the sum of its proper divisors (19160225).

16994331919 is an equidigital number, since it uses as much as digits as its factorization.

16994331919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19160224.

The product of its digits is 1417176, while the sum is 55.

The spelling of 16994331919 in words is "sixteen billion, nine hundred ninety-four million, three hundred thirty-one thousand, nine hundred nineteen".