20285523 has 12 divisors (see below), whose sum is σ = 29739528. Its totient is φ = 13321440.

The previous prime is 20285519. The next prime is 20285527. The reversal of 20285523 is 32558202.

It is an interprime number because it is at equal distance from previous prime (20285519) and next prime (20285527).

It is not a de Polignac number, because 20285523 - 2² = 20285519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20285527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16218 + ... + 17423.

It is an arithmetic number, because the mean of its divisors is an integer number (2478294).

Almost surely, 2^20285523 is an apocalyptic number.

20285523 is a deficient number, since it is larger than the sum of its proper divisors (9454005).

20285523 is a wasteful number, since it uses less digits than its factorization.

20285523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33714 (or 33711 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20285523 is about 4503.9452705378. The cubic root of 20285523 is about 272.7273774848.

The spelling of 20285523 in words is "twenty million, two hundred eighty-five thousand, five hundred twenty-three".