16720911869 has 8 divisors (see below), whose sum is σ = 17188163040. Its totient is φ = 16254467856.

The previous prime is 16720911773. The next prime is 16720911899. The reversal of 16720911869 is 96811902761.

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 16720911869 - 2¹⁶ = 16720846333 is a prime.

It is a super-2 number, since 2×16720911869² (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 (16720911899) 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, 159659 + ... + 242760.

It is an arithmetic number, because the mean of its divisors is an integer number (2148520380).

Almost surely, 2^16720911869 is an apocalyptic number.

It is an amenable number.

16720911869 is a deficient number, since it is larger than the sum of its proper divisors (467251171).

16720911869 is a wasteful number, since it uses less digits than its factorization.

16720911869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403579.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 16720911869 in words is "sixteen billion, seven hundred twenty million, nine hundred eleven thousand, eight hundred sixty-nine".