20567425 has 6 divisors (see below), whose sum is σ = 25503638. Its totient is φ = 16453920.

The previous prime is 20567423. The next prime is 20567429. The reversal of 20567425 is 52476502.

It can be written as a sum of positive squares in 3 ways, for example, as 4511376 + 16056049 = 2124^2 + 4007^2 .

It is not a de Polignac number, because 20567425 - 2¹ = 20567423 is a prime.

It is a super-2 number, since 2×20567425² = 846037942261250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20567423) 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, 411324 + ... + 411373.

Almost surely, 2^20567425 is an apocalyptic number.

20567425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20567425 is a deficient number, since it is larger than the sum of its proper divisors (4936213).

20567425 is an equidigital number, since it uses as much as digits as its factorization.

20567425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822707 (or 822702 counting only the distinct ones).

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

The square root of 20567425 is about 4535.1323023700. The cubic root of 20567425 is about 273.9849077946.

The spelling of 20567425 in words is "twenty million, five hundred sixty-seven thousand, four hundred twenty-five".