16916821839 has 32 divisors (see below), whose sum is σ = 27689955840. Its totient is φ = 10152971136.

The previous prime is 16916821783. The next prime is 16916821847. The reversal of 16916821839 is 93812861961.

It is not a de Polignac number, because 16916821839 - 2⁷ = 16916821711 is a prime.

It is a super-2 number, since 2×16916821839² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16916821039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 790657 + ... + 811770.

It is an arithmetic number, because the mean of its divisors is an integer number (865311120).

Almost surely, 2^16916821839 is an apocalyptic number.

16916821839 is a deficient number, since it is larger than the sum of its proper divisors (10773134001).

16916821839 is a wasteful number, since it uses less digits than its factorization.

16916821839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602476 (or 1602470 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The spelling of 16916821839 in words is "sixteen billion, nine hundred sixteen million, eight hundred twenty-one thousand, eight hundred thirty-nine".