20123332330021 has 4 divisors (see below), whose sum is σ = 20154725984844. Its totient is φ = 20091938675200.

The previous prime is 20123332329967. The next prime is 20123332330051. The reversal of 20123332330021 is 12003323332102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12661420607521 + 7461911722500 = 3558289^2 + 2731650^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123332330021 - 2⁹ = 20123332329509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123332330051) 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 3 ways as a sum of consecutive naturals, for example, 15696826450 + ... + 15696827731.

It is an arithmetic number, because the mean of its divisors is an integer number (5038681496211).

Almost surely, 2^{20123332330021} is an apocalyptic number.

It is an amenable number.

20123332330021 is a deficient number, since it is larger than the sum of its proper divisors (31393654823).

20123332330021 is an equidigital number, since it uses as much as digits as its factorization.

20123332330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31393654822.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 20123332330021 its reverse (12003323332102), we get a palindrome (32126655662123).

The spelling of 20123332330021 in words is "twenty trillion, one hundred twenty-three billion, three hundred thirty-two million, three hundred thirty thousand, twenty-one".