20113239131 has 2 divisors, whose sum is σ = 20113239132. Its totient is φ = 20113239130.

The previous prime is 20113239119. The next prime is 20113239137. The reversal of 20113239131 is 13193231102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20113239131 - 2³⁰ = 19039497307 is a prime.

It is a super-2 number, since 2×20113239131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20113239131.

It is not a weakly prime, because it can be changed into another prime (20113239137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056619565 + 10056619566.

It is an arithmetic number, because the mean of its divisors is an integer number (10056619566).

Almost surely, 2^20113239131 is an apocalyptic number.

20113239131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113239131 is an equidigital number, since it uses as much as digits as its factorization.

20113239131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 20113239131 in words is "twenty billion, one hundred thirteen million, two hundred thirty-nine thousand, one hundred thirty-one".