20113139 has 2 divisors, whose sum is σ = 20113140. Its totient is φ = 20113138.

The previous prime is 20113127. The next prime is 20113169. The reversal of 20113139 is 93131102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20113139 - 2⁴ = 20113123 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20113139.

It is not a weakly prime, because it can be changed into another prime (20113169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056569 + 10056570.

It is an arithmetic number, because the mean of its divisors is an integer number (10056570).

Almost surely, 2^20113139 is an apocalyptic number.

20113139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113139 is an equidigital number, since it uses as much as digits as its factorization.

20113139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 20113139 is about 4484.7674410163. The cubic root of 20113139 is about 271.9526436803.

The spelling of 20113139 in words is "twenty million, one hundred thirteen thousand, one hundred thirty-nine".