20089687 has 2 divisors, whose sum is σ = 20089688. Its totient is φ = 20089686.

The previous prime is 20089661. The next prime is 20089691. The reversal of 20089687 is 78698002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20089687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20089697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10044843 + 10044844.

It is an arithmetic number, because the mean of its divisors is an integer number (10044844).

Almost surely, 2^20089687 is an apocalyptic number.

20089687 is a deficient number, since it is larger than the sum of its proper divisors (1).

20089687 is an equidigital number, since it uses as much as digits as its factorization.

20089687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 20089687 is about 4482.1520500759. The cubic root of 20089687 is about 271.8469032840.

The spelling of 20089687 in words is "twenty million, eighty-nine thousand, six hundred eighty-seven".