21653232345364 has 12 divisors (see below), whose sum is σ = 37893215080224. Its totient is φ = 10826599465304.

The previous prime is 21653232345361. The next prime is 21653232345383. The reversal of 21653232345364 is 46354323235612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21653232345361) 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 3 ways as a sum of consecutive naturals, for example, 990742 + ... + 6654925.

It is an arithmetic number, because the mean of its divisors is an integer number (3157767923352).

Almost surely, 2^{21653232345364} is an apocalyptic number.

It is an amenable number.

21653232345364 is a deficient number, since it is larger than the sum of its proper divisors (16239982734860).

21653232345364 is a wasteful number, since it uses less digits than its factorization.

21653232345364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8353694 (or 8353692 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 49.

The spelling of 21653232345364 in words is "twenty-one trillion, six hundred fifty-three billion, two hundred thirty-two million, three hundred forty-five thousand, three hundred sixty-four".