20323221332 has 18 divisors (see below), whose sum is σ = 37536035418. Its totient is φ = 9626788368.

The previous prime is 20323221277. The next prime is 20323221379. The reversal of 20323221332 is 23312232302.

It can be written as a sum of positive squares in only one way, i.e., 15365089936 + 4958131396 = 123956^2 + 70414^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20323221298 and 20323221307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7035683 + ... + 7038570.

It is an arithmetic number, because the mean of its divisors is an integer number (2085335301).

Almost surely, 2^20323221332 is an apocalyptic number.

It is an amenable number.

20323221332 is a deficient number, since it is larger than the sum of its proper divisors (17212814086).

20323221332 is a wasteful number, since it uses less digits than its factorization.

20323221332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14074295 (or 14074274 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20323221332 its reverse (23312232302), we get a palindrome (43635453634).

The spelling of 20323221332 in words is "twenty billion, three hundred twenty-three million, two hundred twenty-one thousand, three hundred thirty-two".