20633522352421 has 4 divisors (see below), whose sum is σ = 22509297111744. Its totient is φ = 18757747593100.

The previous prime is 20633522352349. The next prime is 20633522352433. The reversal of 20633522352421 is 12425322533602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20633522352421 - 2¹⁷ = 20633522221349 is a prime.

It is a super-2 number, since 2×20633522352421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20633522152421) 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, 937887379645 + ... + 937887379666.

It is an arithmetic number, because the mean of its divisors is an integer number (5627324277936).

Almost surely, 2^{20633522352421} is an apocalyptic number.

It is an amenable number.

20633522352421 is a deficient number, since it is larger than the sum of its proper divisors (1875774759323).

20633522352421 is a wasteful number, since it uses less digits than its factorization.

20633522352421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875774759322.

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 20633522352421 in words is "twenty trillion, six hundred thirty-three billion, five hundred twenty-two million, three hundred fifty-two thousand, four hundred twenty-one".