21633552753 has 8 divisors (see below), whose sum is σ = 28845585600. Its totient is φ = 14421944208.

The previous prime is 21633552751. The next prime is 21633552761. The reversal of 21633552753 is 35725533612.

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

It is not a de Polignac number, because 21633552753 - 2¹ = 21633552751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21633552751) 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 7 ways as a sum of consecutive naturals, for example, 42708 + ... + 212346.

It is an arithmetic number, because the mean of its divisors is an integer number (3605698200).

Almost surely, 2^21633552753 is an apocalyptic number.

It is an amenable number.

21633552753 is a deficient number, since it is larger than the sum of its proper divisors (7212032847).

21633552753 is a wasteful number, since it uses less digits than its factorization.

21633552753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212151.

The product of its digits is 567000, while the sum is 42.

The spelling of 21633552753 in words is "twenty-one billion, six hundred thirty-three million, five hundred fifty-two thousand, seven hundred fifty-three".