16718840219 has 4 divisors (see below), whose sum is σ = 16719103200. Its totient is φ = 16718577240.

The previous prime is 16718840189. The next prime is 16718840251. The reversal of 16718840219 is 91204881761.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16718840219 is a prime.

It is a super-2 number, since 2×16718840219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16718840269) 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, 29909 + ... + 185289.

It is an arithmetic number, because the mean of its divisors is an integer number (4179775800).

Almost surely, 2^16718840219 is an apocalyptic number.

16718840219 is a deficient number, since it is larger than the sum of its proper divisors (262981).

16718840219 is a wasteful number, since it uses less digits than its factorization.

16718840219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262980.

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 16718840219 in words is "sixteen billion, seven hundred eighteen million, eight hundred forty thousand, two hundred nineteen".