20119439 has 2 divisors, whose sum is σ = 20119440. Its totient is φ = 20119438.

The previous prime is 20119433. The next prime is 20119441. The reversal of 20119439 is 93491102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20119439 - 2²⁴ = 3342223 is a prime.

It is a super-3 number, since 3×20119439³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 20119441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20119433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10059719 + 10059720.

It is an arithmetic number, because the mean of its divisors is an integer number (10059720).

Almost surely, 2^20119439 is an apocalyptic number.

20119439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20119439 is an equidigital number, since it uses as much as digits as its factorization.

20119439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20119439 is about 4485.4697635811. The cubic root of 20119439 is about 271.9810351180.

The spelling of 20119439 in words is "twenty million, one hundred nineteen thousand, four hundred thirty-nine".