16972795221 has 8 divisors (see below), whose sum is σ = 22730087904. Its totient is φ = 11265349680.

The previous prime is 16972795219. The next prime is 16972795249. The reversal of 16972795221 is 12259727961.

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

It is not a de Polignac number, because 16972795221 - 2¹ = 16972795219 is a prime.

It is a super-2 number, since 2×16972795221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16972725221) 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 7 ways as a sum of consecutive naturals, for example, 12460990 + ... + 12462351.

It is an arithmetic number, because the mean of its divisors is an integer number (2841260988).

Almost surely, 2^16972795221 is an apocalyptic number.

It is an amenable number.

16972795221 is a deficient number, since it is larger than the sum of its proper divisors (5757292683).

16972795221 is a wasteful number, since it uses less digits than its factorization.

16972795221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24923571.

The product of its digits is 952560, while the sum is 51.

The spelling of 16972795221 in words is "sixteen billion, nine hundred seventy-two million, seven hundred ninety-five thousand, two hundred twenty-one".