20852559 has 96 divisors (see below), whose sum is σ = 41094144. Its totient is φ = 10264320.

The previous prime is 20852543. The next prime is 20852563. The reversal of 20852559 is 95525802.

20852559 is a `hidden beast` number, since 20 + 85 + 2 + 559 = 666.

It is not a de Polignac number, because 20852559 - 2⁴ = 20852543 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20852509) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 508579 + ... + 508619.

It is an arithmetic number, because the mean of its divisors is an integer number (428064).

Almost surely, 2^20852559 is an apocalyptic number.

20852559 is a deficient number, since it is larger than the sum of its proper divisors (20241585).

20852559 is a wasteful number, since it uses less digits than its factorization.

20852559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 20852559 is about 4566.4602264774. The cubic root of 20852559 is about 275.2452203879.

The spelling of 20852559 in words is "twenty million, eight hundred fifty-two thousand, five hundred fifty-nine".