20485089 has 8 divisors (see below), whose sum is σ = 30348320. Its totient is φ = 13656708.

The previous prime is 20485067. The next prime is 20485093. The reversal of 20485089 is 98058402.

It is not a de Polignac number, because 20485089 - 2⁸ = 20484833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20485009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379327 + ... + 379380.

It is an arithmetic number, because the mean of its divisors is an integer number (3793540).

Almost surely, 2^20485089 is an apocalyptic number.

It is an amenable number.

20485089 is a deficient number, since it is larger than the sum of its proper divisors (9863231).

20485089 is an equidigital number, since it uses as much as digits as its factorization.

20485089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758716 (or 758710 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 20485089 is about 4526.0456250462. The cubic root of 20485089 is about 273.6188112259.

The spelling of 20485089 in words is "twenty million, four hundred eighty-five thousand, eighty-nine".