20425256 has 8 divisors (see below), whose sum is σ = 38297370. Its totient is φ = 10212624.

The previous prime is 20425243. The next prime is 20425271. The reversal of 20425256 is 65252402.

It can be written as a sum of positive squares in only one way, i.e., 11628100 + 8797156 = 3410^2 + 2966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276571 + ... + 1276586.

Almost surely, 2^20425256 is an apocalyptic number.

It is an amenable number.

20425256 is a deficient number, since it is larger than the sum of its proper divisors (17872114).

20425256 is a wasteful number, since it uses less digits than its factorization.

20425256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553163 (or 2553159 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 20425256 is about 4519.4309376292. The cubic root of 20425256 is about 273.3521554888.

Adding to 20425256 its reverse (65252402), we get a palindrome (85677658).

The spelling of 20425256 in words is "twenty million, four hundred twenty-five thousand, two hundred fifty-six".