20566152 has 24 divisors (see below), whose sum is σ = 55700190. Its totient is φ = 6855360.

The previous prime is 20566129. The next prime is 20566159. The reversal of 20566152 is 25166502.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 799236 = 4446^2 + 894^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20566159) 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, 142749 + ... + 142892.

Almost surely, 2^20566152 is an apocalyptic number.

It is an amenable number.

20566152 is an abundant number, since it is smaller than the sum of its proper divisors (35134038).

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

20566152 is a wasteful number, since it uses less digits than its factorization.

20566152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285653 (or 285646 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20566152 is about 4534.9919514813. The cubic root of 20566152 is about 273.9792550050.

The spelling of 20566152 in words is "twenty million, five hundred sixty-six thousand, one hundred fifty-two".