20085259 has 4 divisors (see below), whose sum is σ = 20098504. Its totient is φ = 20072016.

The previous prime is 20085239. The next prime is 20085277. The reversal of 20085259 is 95258002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20085259 - 2¹¹ = 20083211 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 20085259.

It is not an unprimeable number, because it can be changed into a prime (20085209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4002 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (5024626).

Almost surely, 2^20085259 is an apocalyptic number.

20085259 is a deficient number, since it is larger than the sum of its proper divisors (13245).

20085259 is a wasteful number, since it uses less digits than its factorization.

20085259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13244.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 20085259 is about 4481.6580637081. The cubic root of 20085259 is about 271.8269290797.

The spelling of 20085259 in words is "twenty million, eighty-five thousand, two hundred fifty-nine".