20566252 has 24 divisors (see below), whose sum is σ = 41350400. Its totient is φ = 8767440.

The previous prime is 20566241. The next prime is 20566267. The reversal of 20566252 is 25266502.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20566252.

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 7 ways as a sum of consecutive naturals, for example, 3727 + ... + 7417.

Almost surely, 2^20566252 is an apocalyptic number.

It is an amenable number.

20566252 is an abundant number, since it is smaller than the sum of its proper divisors (20784148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20566252 is a wasteful number, since it uses less digits than its factorization.

20566252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901 (or 3899 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20566252 is about 4535.0029768458. The cubic root of 20566252 is about 273.9796990660.

The spelling of 20566252 in words is "twenty million, five hundred sixty-six thousand, two hundred fifty-two".