20425825 has 12 divisors (see below), whose sum is σ = 28946560. Its totient is φ = 14006160.

The previous prime is 20425799. The next prime is 20425849. The reversal of 20425825 is 52852402.

It is not a de Polignac number, because 20425825 - 2⁵ = 20425793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20425793 and 20425802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58185 + ... + 58534.

Almost surely, 2^20425825 is an apocalyptic number.

20425825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20425825 is a deficient number, since it is larger than the sum of its proper divisors (8520735).

20425825 is a wasteful number, since it uses less digits than its factorization.

20425825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116736 (or 116731 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 20425825 is about 4519.4938875941. The cubic root of 20425825 is about 273.3546937831.

The spelling of 20425825 in words is "twenty million, four hundred twenty-five thousand, eight hundred twenty-five".