20321320332 has 24 divisors (see below), whose sum is σ = 47466829872. Its totient is φ = 6766571200.

The previous prime is 20321320289. The next prime is 20321320333. The reversal of 20321320332 is 23302312302.

It is a junction number, because it is equal to n+sod(n) for n = 20321320299 and 20321320308.

It is not an unprimeable number, because it can be changed into a prime (20321320333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888519 + ... + 911102.

It is an arithmetic number, because the mean of its divisors is an integer number (1977784578).

Almost surely, 2^20321320332 is an apocalyptic number.

It is an amenable number.

20321320332 is an abundant number, since it is smaller than the sum of its proper divisors (27145509540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321320332 is a wasteful number, since it uses less digits than its factorization.

20321320332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800569 (or 1800567 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20321320332 its reverse (23302312302), we get a palindrome (43623632634).

The spelling of 20321320332 in words is "twenty billion, three hundred twenty-one million, three hundred twenty thousand, three hundred thirty-two".