20013540140525 has 24 divisors (see below), whose sum is σ = 24832628985024. Its totient is φ = 16000616620800.

The previous prime is 20013540140509. The next prime is 20013540140527. The reversal of 20013540140525 is 52504104531002.

It is not a de Polignac number, because 20013540140525 - 2⁴ = 20013540140509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013540140491 and 20013540140500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013540140527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258590984 + ... + 258668366.

It is an arithmetic number, because the mean of its divisors is an integer number (1034692874376).

Almost surely, 2^{20013540140525} is an apocalyptic number.

20013540140525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20013540140525 is a deficient number, since it is larger than the sum of its proper divisors (4819088844499).

20013540140525 is a wasteful number, since it uses less digits than its factorization.

20013540140525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83861 (or 83856 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 20013540140525 its reverse (52504104531002), we get a palindrome (72517644671527).

The spelling of 20013540140525 in words is "twenty trillion, thirteen billion, five hundred forty million, one hundred forty thousand, five hundred twenty-five".