20088385 has 12 divisors (see below), whose sum is σ = 24481044. Its totient is φ = 15824480.

The previous prime is 20088371. The next prime is 20088391. The reversal of 20088385 is 58388002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8473921 + 11614464 = 2911^2 + 3408^2 .

It is not a de Polignac number, because 20088385 - 2¹⁷ = 19957313 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 20088385.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24807 + ... + 25603.

It is an arithmetic number, because the mean of its divisors is an integer number (2040087).

Almost surely, 2^20088385 is an apocalyptic number.

It is an amenable number.

20088385 is a deficient number, since it is larger than the sum of its proper divisors (4392659).

20088385 is an frugal number, since it uses more digits than its factorization.

20088385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 20088385 is about 4482.0068049926. The cubic root of 20088385 is about 271.8410304147.

The spelling of 20088385 in words is "twenty million, eighty-eight thousand, three hundred eighty-five".