20975089 has 2 divisors, whose sum is σ = 20975090. Its totient is φ = 20975088.

The previous prime is 20975083. The next prime is 20975117. The reversal of 20975089 is 98057902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19070689 + 1904400 = 4367^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 20975089 - 2³ = 20975081 is a prime.

It is not a weakly prime, because it can be changed into another prime (20975081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10487544 + 10487545.

It is an arithmetic number, because the mean of its divisors is an integer number (10487545).

Almost surely, 2^20975089 is an apocalyptic number.

It is an amenable number.

20975089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20975089 is an equidigital number, since it uses as much as digits as its factorization.

20975089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 20975089 is about 4579.8568754929. The cubic root of 20975089 is about 275.7832831082.

The spelling of 20975089 in words is "twenty million, nine hundred seventy-five thousand, eighty-nine".