20567245 has 4 divisors (see below), whose sum is σ = 24680700. Its totient is φ = 16453792.

The previous prime is 20567237. The next prime is 20567249. The reversal of 20567245 is 54276502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9998244 + 10569001 = 3162^2 + 3251^2 .

It is a cyclic number.

It is not a de Polignac number, because 20567245 - 2³ = 20567237 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20567249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2056720 + ... + 2056729.

It is an arithmetic number, because the mean of its divisors is an integer number (6170175).

Almost surely, 2^20567245 is an apocalyptic number.

It is an amenable number.

20567245 is a deficient number, since it is larger than the sum of its proper divisors (4113455).

20567245 is an equidigital number, since it uses as much as digits as its factorization.

20567245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113454.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 20567245 is about 4535.1124572606. The cubic root of 20567245 is about 273.9841085141.

The spelling of 20567245 in words is "twenty million, five hundred sixty-seven thousand, two hundred forty-five".