20431052140 has 24 divisors (see below), whose sum is σ = 42921219600. Its totient is φ = 8169371328.

The previous prime is 20431052137. The next prime is 20431052153. The reversal of 20431052140 is 4125013402.

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, 135267 + ... + 243226.

It is an arithmetic number, because the mean of its divisors is an integer number (1788384150).

Almost surely, 2^20431052140 is an apocalyptic number.

20431052140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431052140 is an abundant number, since it is smaller than the sum of its proper divisors (22490167460).

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

20431052140 is a wasteful number, since it uses less digits than its factorization.

20431052140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381201 (or 381199 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20431052140 its reverse (4125013402), we get a palindrome (24556065542).

The spelling of 20431052140 in words is "twenty billion, four hundred thirty-one million, fifty-two thousand, one hundred forty".