20315246500 has 96 divisors (see below), whose sum is σ = 49451351040. Its totient is φ = 7245504000.

The previous prime is 20315246473. The next prime is 20315246503. The reversal of 20315246500 is 564251302.

It is not an unprimeable number, because it can be changed into a prime (20315246503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98605 + ... + 224395.

It is an arithmetic number, because the mean of its divisors is an integer number (515118240).

Almost surely, 2^20315246500 is an apocalyptic number.

20315246500 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 20315246500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24725675520).

20315246500 is an abundant number, since it is smaller than the sum of its proper divisors (29136104540).

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

20315246500 is a wasteful number, since it uses less digits than its factorization.

20315246500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125846 (or 125834 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20315246500 its reverse (564251302), we get a palindrome (20879497802).

It can be divided in two parts, 20315 and 246500, that added together give a triangular number (266815 = T₇₃₀).

The spelling of 20315246500 in words is "twenty billion, three hundred fifteen million, two hundred forty-six thousand, five hundred".