20001331232 has 48 divisors (see below), whose sum is σ = 42221813760. Its totient is φ = 9293227008.

The previous prime is 20001331211. The next prime is 20001331243. The reversal of 20001331232 is 23213310002.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20001331232.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189728 + ... + 275679.

It is an arithmetic number, because the mean of its divisors is an integer number (879621120).

Almost surely, 2^20001331232 is an apocalyptic number.

It is an amenable number.

20001331232 is an abundant number, since it is smaller than the sum of its proper divisors (22220482528).

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

20001331232 is a wasteful number, since it uses less digits than its factorization.

20001331232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465513 (or 465505 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20001331232 its reverse (23213310002), we get a palindrome (43214641234).

The spelling of 20001331232 in words is "twenty billion, one million, three hundred thirty-one thousand, two hundred thirty-two".