15315324020 has 24 divisors (see below), whose sum is σ = 32240833800. Its totient is φ = 6111148032.

The previous prime is 15315324001. The next prime is 15315324023. The reversal of 15315324020 is 2042351351.

It is a happy number.

15315324020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9611449444 + 5703874576 = 98038^2 + 75524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15315324023) 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 7 ways as a sum of consecutive naturals, for example, 927965 + ... + 944324.

It is an arithmetic number, because the mean of its divisors is an integer number (1343368075).

Almost surely, 2^15315324020 is an apocalyptic number.

15315324020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15315324020 is an abundant number, since it is smaller than the sum of its proper divisors (16925509780).

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

15315324020 is a wasteful number, since it uses less digits than its factorization.

15315324020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872707 (or 1872705 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 15315324020 its reverse (2042351351), we get a palindrome (17357675371).

The spelling of 15315324020 in words is "fifteen billion, three hundred fifteen million, three hundred twenty-four thousand, twenty".