20852485 has 4 divisors (see below), whose sum is σ = 25022988. Its totient is φ = 16681984.

The previous prime is 20852473. The next prime is 20852501. The reversal of 20852485 is 58425802.

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 9012004 + 11840481 = 3002^2 + 3441^2 .

It is a cyclic number.

It is not a de Polignac number, because 20852485 - 2¹¹ = 20850437 is a prime.

It is a super-2 number, since 2×20852485² = 869652261350450, 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 20852485.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2085244 + ... + 2085253.

It is an arithmetic number, because the mean of its divisors is an integer number (6255747).

Almost surely, 2^20852485 is an apocalyptic number.

It is an amenable number.

20852485 is a deficient number, since it is larger than the sum of its proper divisors (4170503).

20852485 is an equidigital number, since it uses as much as digits as its factorization.

20852485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170502.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 20852485 is about 4566.4521239141. The cubic root of 20852485 is about 275.2448947976.

The spelling of 20852485 in words is "twenty million, eight hundred fifty-two thousand, four hundred eighty-five".