20456089 has 12 divisors (see below), whose sum is σ = 21530608. Its totient is φ = 19424160.

The previous prime is 20456087. The next prime is 20456113. The reversal of 20456089 is 98065402.

It is a happy number.

It is not a de Polignac number, because 20456089 - 2¹ = 20456087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20456081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72142 + ... + 72424.

Almost surely, 2^20456089 is an apocalyptic number.

It is an amenable number.

20456089 is a deficient number, since it is larger than the sum of its proper divisors (1074519).

20456089 is an equidigital number, since it uses as much as digits as its factorization.

20456089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 20456089 is about 4522.8408108179. The cubic root of 20456089 is about 273.4896328288.

The spelling of 20456089 in words is "twenty million, four hundred fifty-six thousand, eighty-nine".