20013012139 has 2 divisors, whose sum is σ = 20013012140. Its totient is φ = 20013012138.

The previous prime is 20013012101. The next prime is 20013012163. The reversal of 20013012139 is 93121031002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013012139 is a prime.

It is a super-2 number, since 2×20013012139² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20013012199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006506069 + 10006506070.

It is an arithmetic number, because the mean of its divisors is an integer number (10006506070).

Almost surely, 2^20013012139 is an apocalyptic number.

20013012139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013012139 is an equidigital number, since it uses as much as digits as its factorization.

20013012139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 20013012139 in words is "twenty billion, thirteen million, twelve thousand, one hundred thirty-nine".