20131140432 has 80 divisors (see below), whose sum is σ = 56099187200. Its totient is φ = 6183876096.

The previous prime is 20131140401. The next prime is 20131140443. The reversal of 20131140432 is 23404113102.

It is a junction number, because it is equal to n+sod(n) for n = 20131140399 and 20131140408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352194 + ... + 405342.

It is an arithmetic number, because the mean of its divisors is an integer number (701239840).

Almost surely, 2^20131140432 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 20131140432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28049593600).

20131140432 is an abundant number, since it is smaller than the sum of its proper divisors (35968046768).

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

20131140432 is a wasteful number, since it uses less digits than its factorization.

20131140432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53780 (or 53774 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20131140432 its reverse (23404113102), we get a palindrome (43535253534).

The spelling of 20131140432 in words is "twenty billion, one hundred thirty-one million, one hundred forty thousand, four hundred thirty-two".