20315250636525 has 288 divisors, whose sum is σ = 42278315264640. Its totient is φ = 9235040256000.

The previous prime is 20315250636451. The next prime is 20315250636553. The reversal of 20315250636525 is 52563605251302.

It is a happy number.

20315250636525 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 5 + 2 + 5 + 0 + 636 + 5 + 2 + 5 = 666.

It is not a de Polignac number, because 20315250636525 - 2²⁸ = 20314982201069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1528490130 + ... + 1528503420.

It is an arithmetic number, because the mean of its divisors is an integer number (146799705780).

Almost surely, 2^{20315250636525} is an apocalyptic number.

20315250636525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20315250636525 is an abundant number, since it is smaller than the sum of its proper divisors (21963064628115).

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

20315250636525 is a wasteful number, since it uses less digits than its factorization.

20315250636525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13917 (or 13909 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 45.

Adding to 20315250636525 its reverse (52563605251302), we get a palindrome (72878855887827).

The spelling of 20315250636525 in words is "twenty trillion, three hundred fifteen billion, two hundred fifty million, six hundred thirty-six thousand, five hundred twenty-five".