20139011 has 2 divisors, whose sum is σ = 20139012. Its totient is φ = 20139010.

The previous prime is 20138981. The next prime is 20139013. The reversal of 20139011 is 11093102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20139011 - 2¹⁸ = 19876867 is a prime.

It is a Sophie Germain prime.

Together with 20139013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20139013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10069505 + 10069506.

It is an arithmetic number, because the mean of its divisors is an integer number (10069506).

Almost surely, 2^20139011 is an apocalyptic number.

20139011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20139011 is an equidigital number, since it uses as much as digits as its factorization.

20139011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 20139011 is about 4487.6509445366. The cubic root of 20139011 is about 272.0692000619.

The spelling of 20139011 in words is "twenty million, one hundred thirty-nine thousand, eleven".