16704021965 has 16 divisors (see below), whose sum is σ = 20393493120. Its totient is φ = 13132002240.

The previous prime is 16704021947. The next prime is 16704021967. The reversal of 16704021965 is 56912040761.

It is not a de Polignac number, because 16704021965 - 2²⁰ = 16702973389 is a prime.

It is a super-2 number, since 2×16704021965² (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 (16704021967) 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 15 ways as a sum of consecutive naturals, for example, 32351 + ... + 185619.

It is an arithmetic number, because the mean of its divisors is an integer number (1274593320).

Almost surely, 2^16704021965 is an apocalyptic number.

It is an amenable number.

16704021965 is a deficient number, since it is larger than the sum of its proper divisors (3689471155).

16704021965 is a wasteful number, since it uses less digits than its factorization.

16704021965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153652.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 16704021965 in words is "sixteen billion, seven hundred four million, twenty-one thousand, nine hundred sixty-five".