16816993417 has 16 divisors (see below), whose sum is σ = 19421724672. Its totient is φ = 14263436880.

The previous prime is 16816993409. The next prime is 16816993447. The reversal of 16816993417 is 71439961861.

It is not a de Polignac number, because 16816993417 - 2³ = 16816993409 is a prime.

It is a super-2 number, since 2×16816993417² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16816993447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315792 + ... + 365182.

It is an arithmetic number, because the mean of its divisors is an integer number (1213857792).

Almost surely, 2^16816993417 is an apocalyptic number.

It is an amenable number.

16816993417 is a deficient number, since it is larger than the sum of its proper divisors (2604731255).

16816993417 is a wasteful number, since it uses less digits than its factorization.

16816993417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49908.

The product of its digits is 1959552, while the sum is 55.

The spelling of 16816993417 in words is "sixteen billion, eight hundred sixteen million, nine hundred ninety-three thousand, four hundred seventeen".