20152085 has 4 divisors (see below), whose sum is σ = 24182508. Its totient is φ = 16121664.

The previous prime is 20152073. The next prime is 20152127. The reversal of 20152085 is 58025102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6543364 + 13608721 = 2558^2 + 3689^2 .

It is a cyclic number.

It is not a de Polignac number, because 20152085 - 2²⁴ = 3374869 is a prime.

It is a super-2 number, since 2×20152085² = 812213059694450, which contains 22 as substring.

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 20152085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015204 + ... + 2015213.

It is an arithmetic number, because the mean of its divisors is an integer number (6045627).

Almost surely, 2^20152085 is an apocalyptic number.

It is an amenable number.

20152085 is a deficient number, since it is larger than the sum of its proper divisors (4030423).

20152085 is an equidigital number, since it uses as much as digits as its factorization.

20152085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030422.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 20152085 is about 4489.1073722957. The cubic root of 20152085 is about 272.1280619936.

Adding to 20152085 its reverse (58025102), we get a palindrome (78177187).

The spelling of 20152085 in words is "twenty million, one hundred fifty-two thousand, eighty-five".