20312440500 has 192 divisors, whose sum is σ = 65348075520. Its totient is φ = 4861584000.

The previous prime is 20312440487. The next prime is 20312440513. The reversal of 20312440500 is 504421302.

It is an interprime number because it is at equal distance from previous prime (20312440487) and next prime (20312440513).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1295709 + ... + 1311291.

It is an arithmetic number, because the mean of its divisors is an integer number (340354560).

Almost surely, 2^20312440500 is an apocalyptic number.

20312440500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312440500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32674037760).

20312440500 is an abundant number, since it is smaller than the sum of its proper divisors (45035635020).

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

20312440500 is a wasteful number, since it uses less digits than its factorization.

20312440500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15695 (or 15683 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 20312440500 its reverse (504421302), we get a palindrome (20816861802).

The spelling of 20312440500 in words is "twenty billion, three hundred twelve million, four hundred forty thousand, five hundred".