20320253125 has 24 divisors (see below), whose sum is σ = 25650561384. Its totient is φ = 16095000000.

The previous prime is 20320253101. The next prime is 20320253131. The reversal of 20320253125 is 52135202302.

It can be written as a sum of positive squares in 12 ways, for example, as 16306523809 + 4013729316 = 127697^2 + 63354^2 .

It is not a de Polignac number, because 20320253125 - 2⁹ = 20320252613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20320253125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283435 + ... + 347815.

It is an arithmetic number, because the mean of its divisors is an integer number (1068773391).

Almost surely, 2^20320253125 is an apocalyptic number.

20320253125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20320253125 is a deficient number, since it is larger than the sum of its proper divisors (5330308259).

20320253125 is an frugal number, since it uses more digits than its factorization.

20320253125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64507 (or 64487 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20320253125 its reverse (52135202302), we get a palindrome (72455455427).

The spelling of 20320253125 in words is "twenty billion, three hundred twenty million, two hundred fifty-three thousand, one hundred twenty-five".