20787127 has 2 divisors, whose sum is σ = 20787128. Its totient is φ = 20787126.

The previous prime is 20787119. The next prime is 20787133. The reversal of 20787127 is 72178702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20787127 - 2³ = 20787119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20787092 and 20787101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20787157) 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, 10393563 + 10393564.

It is an arithmetic number, because the mean of its divisors is an integer number (10393564).

Almost surely, 2^20787127 is an apocalyptic number.

20787127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20787127 is an equidigital number, since it uses as much as digits as its factorization.

20787127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 20787127 is about 4559.2901859829. The cubic root of 20787127 is about 274.9570268939.

The spelling of 20787127 in words is "twenty million, seven hundred eighty-seven thousand, one hundred twenty-seven".