20431040484 has 96 divisors (see below), whose sum is σ = 50400403200. Its totient is φ = 6428950528.

The previous prime is 20431040479. The next prime is 20431040503. The reversal of 20431040484 is 48404013402.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8014042 + ... + 8016590.

It is an arithmetic number, because the mean of its divisors is an integer number (525004200).

Almost surely, 2^20431040484 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 20431040484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25200201600).

20431040484 is an abundant number, since it is smaller than the sum of its proper divisors (29969362716).

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

20431040484 is a wasteful number, since it uses less digits than its factorization.

20431040484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949 (or 2947 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 20431040484 its reverse (48404013402), we get a palindrome (68835053886).

The spelling of 20431040484 in words is "twenty billion, four hundred thirty-one million, forty thousand, four hundred eighty-four".