20085399 has 6 divisors (see below), whose sum is σ = 29012256. Its totient is φ = 13390260.

The previous prime is 20085397. The next prime is 20085467. The reversal of 20085399 is 99358002.

It is not a de Polignac number, because 20085399 - 2¹ = 20085397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085397) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1115847 + ... + 1115864.

It is an arithmetic number, because the mean of its divisors is an integer number (4835376).

Almost surely, 2^20085399 is an apocalyptic number.

20085399 is a deficient number, since it is larger than the sum of its proper divisors (8926857).

20085399 is a wasteful number, since it uses less digits than its factorization.

20085399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231717 (or 2231714 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20085399 is about 4481.6736829002. The cubic root of 20085399 is about 271.8275606487.

The spelling of 20085399 in words is "twenty million, eighty-five thousand, three hundred ninety-nine".