20321113232 has 80 divisors (see below), whose sum is σ = 45824209920. Its totient is φ = 8549318784.

The previous prime is 20321113207. The next prime is 20321113283. The reversal of 20321113232 is 23231112302.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5859563 + ... + 5863029.

It is an arithmetic number, because the mean of its divisors is an integer number (572802624).

Almost surely, 2^20321113232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20321113232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22912104960).

20321113232 is an abundant number, since it is smaller than the sum of its proper divisors (25503096688).

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

20321113232 is a wasteful number, since it uses less digits than its factorization.

20321113232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428 (or 4422 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20321113232 its reverse (23231112302), we get a palindrome (43552225534).

The spelling of 20321113232 in words is "twenty billion, three hundred twenty-one million, one hundred thirteen thousand, two hundred thirty-two".