21796193653 has 16 divisors (see below), whose sum is σ = 25056259200. Its totient is φ = 18792164160.

The previous prime is 21796193609. The next prime is 21796193719. The reversal of 21796193653 is 35639169712.

It is a cyclic number.

It is not a de Polignac number, because 21796193653 - 2¹⁷ = 21796062581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21796193653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796191653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603898 + ... + 638971.

It is an arithmetic number, because the mean of its divisors is an integer number (1566016200).

Almost surely, 2^21796193653 is an apocalyptic number.

It is an amenable number.

21796193653 is a deficient number, since it is larger than the sum of its proper divisors (3260065547).

21796193653 is a wasteful number, since it uses less digits than its factorization.

21796193653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242972.

The product of its digits is 1837080, while the sum is 52.

The spelling of 21796193653 in words is "twenty-one billion, seven hundred ninety-six million, one hundred ninety-three thousand, six hundred fifty-three".