20655252 has 18 divisors (see below), whose sum is σ = 52211978. Its totient is φ = 6885072.

The previous prime is 20655241. The next prime is 20655259. The reversal of 20655252 is 25255602.

20655252 is a `hidden beast` number, since 2 + 0 + 655 + 2 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12152196 + 8503056 = 3486^2 + 2916^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286843 + ... + 286914.

Almost surely, 2^20655252 is an apocalyptic number.

It is an amenable number.

20655252 is an abundant number, since it is smaller than the sum of its proper divisors (31556726).

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

20655252 is a wasteful number, since it uses less digits than its factorization.

20655252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573767 (or 573762 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 20655252 is about 4544.8049463096. The cubic root of 20655252 is about 274.3743440329.

The spelling of 20655252 in words is "twenty million, six hundred fifty-five thousand, two hundred fifty-two".