20332532923921 has 3 divisors (see below), whose sum is σ = 20332537433083. Its totient is φ = 20332528414760.

The previous prime is 20332532923909. The next prime is 20332532923979. The reversal of 20332532923921 is 12932923523302.

The square root of 20332532923921 is 4509161.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 110962938321 + 20221569985600 = 333111^2 + 4496840^2 .

It is not a de Polignac number, because 20332532923921 - 2¹¹ = 20332532921873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20332532923321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2254581 + ... + 6763741.

Almost surely, 2^{20332532923921} is an apocalyptic number.

20332532923921 is the 4509161-st square number.

20332532923921 is the 2254581-st centered octagonal number.

It is an amenable number.

20332532923921 is a deficient number, since it is larger than the sum of its proper divisors (4509162).

20332532923921 is an frugal number, since it uses more digits than its factorization.

20332532923921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9018322 (or 4509161 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 46.

The spelling of 20332532923921 in words is "twenty trillion, three hundred thirty-two billion, five hundred thirty-two million, nine hundred twenty-three thousand, nine hundred twenty-one".