20124085 has 4 divisors (see below), whose sum is σ = 24148908. Its totient is φ = 16099264.

The previous prime is 20124079. The next prime is 20124101. The reversal of 20124085 is 58042102.

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 9108324 + 11015761 = 3018^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124085 - 2⁹ = 20123573 is a prime.

It is a Duffinian number.

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, 2012404 + ... + 2012413.

It is an arithmetic number, because the mean of its divisors is an integer number (6037227).

Almost surely, 2^20124085 is an apocalyptic number.

It is an amenable number.

20124085 is a deficient number, since it is larger than the sum of its proper divisors (4024823).

20124085 is an equidigital number, since it uses as much as digits as its factorization.

20124085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024822.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20124085 is about 4485.9876281595. The cubic root of 20124085 is about 272.0019688799.

Adding to 20124085 its reverse (58042102), we get a palindrome (78166187).

The spelling of 20124085 in words is "twenty million, one hundred twenty-four thousand, eighty-five".