20085663 has 16 divisors (see below), whose sum is σ = 28974176. Its totient is φ = 12303360.

The previous prime is 20085643. The next prime is 20085697. The reversal of 20085663 is 36658002.

It is not a de Polignac number, because 20085663 - 2⁵ = 20085631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20085663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8331 + ... + 10467.

It is an arithmetic number, because the mean of its divisors is an integer number (1810886).

Almost surely, 2^20085663 is an apocalyptic number.

20085663 is a deficient number, since it is larger than the sum of its proper divisors (8888513).

20085663 is a wasteful number, since it uses less digits than its factorization.

20085663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20085663 is about 4481.7031360857. The cubic root of 20085663 is about 271.8287515994.

The spelling of 20085663 in words is "twenty million, eighty-five thousand, six hundred sixty-three".