20787119 has 2 divisors, whose sum is σ = 20787120. Its totient is φ = 20787118.

The previous prime is 20787079. The next prime is 20787127. The reversal of 20787119 is 91178702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20787119 - 2⁸ = 20786863 is a prime.

It is a super-2 number, since 2×20787119² = 864208632640322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20787149) 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, 10393559 + 10393560.

It is an arithmetic number, because the mean of its divisors is an integer number (10393560).

Almost surely, 2^20787119 is an apocalyptic number.

20787119 is a deficient number, since it is larger than the sum of its proper divisors (1).

20787119 is an equidigital number, since it uses as much as digits as its factorization.

20787119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 20787119 is about 4559.2893086533. The cubic root of 20787119 is about 274.9569916212.

The spelling of 20787119 in words is "twenty million, seven hundred eighty-seven thousand, one hundred nineteen".