20133131232 has 96 divisors (see below), whose sum is σ = 53699151744. Its totient is φ = 6603379200.

The previous prime is 20133131231. The next prime is 20133131237. The reversal of 20133131232 is 23213133102.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 20133131199 and 20133131208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133131231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10425307 + ... + 10427237.

It is an arithmetic number, because the mean of its divisors is an integer number (559366164).

Almost surely, 2^20133131232 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 20133131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26849575872).

20133131232 is an abundant number, since it is smaller than the sum of its proper divisors (33566020512).

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

20133131232 is a wasteful number, since it uses less digits than its factorization.

20133131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632 (or 3624 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20133131232 its reverse (23213133102), we get a palindrome (43346264334).

The spelling of 20133131232 in words is "twenty billion, one hundred thirty-three million, one hundred thirty-one thousand, two hundred thirty-two".