20104013131 has 2 divisors, whose sum is σ = 20104013132. Its totient is φ = 20104013130.

The previous prime is 20104013087. The next prime is 20104013147. The reversal of 20104013131 is 13131040102.

It is an a-pointer prime, because the next prime (20104013147) can be obtained adding 20104013131 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20104013131 - 2⁷ = 20104013003 is a prime.

It is a super-2 number, since 2×20104013131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20104013161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052006565 + 10052006566.

It is an arithmetic number, because the mean of its divisors is an integer number (10052006566).

Almost surely, 2^20104013131 is an apocalyptic number.

20104013131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104013131 is an equidigital number, since it uses as much as digits as its factorization.

20104013131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20104013131 its reverse (13131040102), we get a palindrome (33235053233).

The spelling of 20104013131 in words is "twenty billion, one hundred four million, thirteen thousand, one hundred thirty-one".