20013725100031 has 16 divisors (see below), whose sum is σ = 21689111630368. Its totient is φ = 18357906614400.

The previous prime is 20013725099981. The next prime is 20013725100091. The reversal of 20013725100031 is 13000152731002.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013725100031 is a prime.

It is a super-2 number, since 2×20013725100031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20013725099969 and 20013725100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013725100091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256476 + ... + 6331921.

It is an arithmetic number, because the mean of its divisors is an integer number (1355569476898).

Almost surely, 2^{20013725100031} is an apocalyptic number.

20013725100031 is a deficient number, since it is larger than the sum of its proper divisors (1675386530337).

20013725100031 is a wasteful number, since it uses less digits than its factorization.

20013725100031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6589882.

The product of its (nonzero) digits is 1260, while the sum is 25.

Adding to 20013725100031 its reverse (13000152731002), we get a palindrome (33013877831033).

The spelling of 20013725100031 in words is "twenty trillion, thirteen billion, seven hundred twenty-five million, one hundred thousand, thirty-one".