20013124157525 has 12 divisors (see below), whose sum is σ = 24820863779712. Its totient is φ = 16007538149040.

The previous prime is 20013124157513. The next prime is 20013124157557. The reversal of 20013124157525 is 52575142131002.

It is not a de Polignac number, because 20013124157525 - 2⁴⁴ = 2420938113109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 73891547 + ... + 74161896.

It is an arithmetic number, because the mean of its divisors is an integer number (2068405314976).

Almost surely, 2^{20013124157525} is an apocalyptic number.

20013124157525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20013124157525 is a deficient number, since it is larger than the sum of its proper divisors (4807739622187).

20013124157525 is a wasteful number, since it uses less digits than its factorization.

20013124157525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148058860 (or 148058855 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

Adding to 20013124157525 its reverse (52575142131002), we get a palindrome (72588266288527).

The spelling of 20013124157525 in words is "twenty trillion, thirteen billion, one hundred twenty-four million, one hundred fifty-seven thousand, five hundred twenty-five".