20023132321 has 12 divisors (see below), whose sum is σ = 21730703436. Its totient is φ = 18385633280.

The previous prime is 20023132303. The next prime is 20023132369. The reversal of 20023132321 is 12323132002.

It can be written as a sum of positive squares in 6 ways, for example, as 2348759296 + 17674373025 = 48464^2 + 132945^2 .

It is not a de Polignac number, because 20023132321 - 2⁵ = 20023132289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023132301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321760 + ... + 378913.

It is an arithmetic number, because the mean of its divisors is an integer number (1810891953).

Almost surely, 2^20023132321 is an apocalyptic number.

It is an amenable number.

20023132321 is a deficient number, since it is larger than the sum of its proper divisors (1707571115).

20023132321 is an equidigital number, since it uses as much as digits as its factorization.

20023132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700772 (or 700731 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20023132321 its reverse (12323132002), we get a palindrome (32346264323).

The spelling of 20023132321 in words is "twenty billion, twenty-three million, one hundred thirty-two thousand, three hundred twenty-one".