20607889 has 2 divisors, whose sum is σ = 20607890. Its totient is φ = 20607888.

The previous prime is 20607863. The next prime is 20607907. The reversal of 20607889 is 98870602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17918289 + 2689600 = 4233^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 20607889 - 2⁵ = 20607857 is a prime.

It is not a weakly prime, because it can be changed into another prime (607889) 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, 10303944 + 10303945.

It is an arithmetic number, because the mean of its divisors is an integer number (10303945).

Almost surely, 2^20607889 is an apocalyptic number.

It is an amenable number.

20607889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20607889 is an equidigital number, since it uses as much as digits as its factorization.

20607889 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 20607889 is about 4539.5912811618. The cubic root of 20607889 is about 274.1644678314.

The spelling of 20607889 in words is "twenty million, six hundred seven thousand, eight hundred eighty-nine".