16923409919 has 8 divisors (see below), whose sum is σ = 18813121152. Its totient is φ = 15117685920.

The previous prime is 16923409907. The next prime is 16923409957. The reversal of 16923409919 is 91990432961.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16923409919 - 2²⁸ = 16654974463 is a prime.

It is a super-2 number, since 2×16923409919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16923409999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20996384 + ... + 20997189.

It is an arithmetic number, because the mean of its divisors is an integer number (2351640144).

Almost surely, 2^16923409919 is an apocalyptic number.

16923409919 is a deficient number, since it is larger than the sum of its proper divisors (1889711233).

16923409919 is a wasteful number, since it uses less digits than its factorization.

16923409919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41993617.

The product of its (nonzero) digits is 944784, while the sum is 53.

The spelling of 16923409919 in words is "sixteen billion, nine hundred twenty-three million, four hundred nine thousand, nine hundred nineteen".