20569425 has 12 divisors (see below), whose sum is σ = 34008240. Its totient is φ = 10970320.

The previous prime is 20569403. The next prime is 20569433. The reversal of 20569425 is 52496502.

It is not a de Polignac number, because 20569425 - 2⁸ = 20569169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137055 + ... + 137204.

It is an arithmetic number, because the mean of its divisors is an integer number (2834020).

Almost surely, 2^20569425 is an apocalyptic number.

20569425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20569425 is a deficient number, since it is larger than the sum of its proper divisors (13438815).

20569425 is a wasteful number, since it uses less digits than its factorization.

20569425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274272 (or 274267 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 20569425 is about 4535.3527977435. The cubic root of 20569425 is about 273.9937883757.

The spelling of 20569425 in words is "twenty million, five hundred sixty-nine thousand, four hundred twenty-five".