20125115213 has 12 divisors (see below), whose sum is σ = 23413356252. Its totient is φ = 17248250880.

The previous prime is 20125115203. The next prime is 20125115233. The reversal of 20125115213 is 31251152102.

It can be written as a sum of positive squares in 2 ways, for example, as 2041051684 + 18084063529 = 45178^2 + 134477^2 .

It is not a de Polignac number, because 20125115213 - 2²⁶ = 20058006349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125115203) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 643331 + ... + 673887.

It is an arithmetic number, because the mean of its divisors is an integer number (1951113021).

Almost surely, 2^20125115213 is an apocalyptic number.

It is an amenable number.

20125115213 is a deficient number, since it is larger than the sum of its proper divisors (3288241039).

20125115213 is a wasteful number, since it uses less digits than its factorization.

20125115213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44012 (or 44005 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 20125115213 its reverse (31251152102), we get a palindrome (51376267315).

The spelling of 20125115213 in words is "twenty billion, one hundred twenty-five million, one hundred fifteen thousand, two hundred thirteen".