20131204432 has 40 divisors (see below), whose sum is σ = 41366287656. Its totient is φ = 9457975296.

The previous prime is 20131204417. The next prime is 20131204439. The reversal of 20131204432 is 23440213102.

It can be written as a sum of positive squares in 4 ways, for example, as 3460262976 + 16670941456 = 58824^2 + 129116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131204439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106368 + ... + 227104.

Almost surely, 2^20131204432 is an apocalyptic number.

It is an amenable number.

20131204432 is an abundant number, since it is smaller than the sum of its proper divisors (21235083224).

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

20131204432 is a wasteful number, since it uses less digits than its factorization.

20131204432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121375 (or 121369 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20131204432 its reverse (23440213102), we get a palindrome (43571417534).

The spelling of 20131204432 in words is "twenty billion, one hundred thirty-one million, two hundred four thousand, four hundred thirty-two".