25630636 has 12 divisors (see below), whose sum is σ = 44947000. Its totient is φ = 12788640.

The previous prime is 25630621. The next prime is 25630637. The reversal of 25630636 is 63603652.

It is a junction number, because it is equal to n+sod(n) for n = 25630598 and 25630607.

It is not an unprimeable number, because it can be changed into a prime (25630637) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4425 + ... + 8416.

Almost surely, 2^25630636 is an apocalyptic number.

It is an amenable number.

25630636 is a deficient number, since it is larger than the sum of its proper divisors (19316364).

25630636 is a wasteful number, since it uses less digits than its factorization.

25630636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13344 (or 13342 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 25630636 is about 5062.6708366237. The cubic root of 25630636 is about 294.8400396795.

The spelling of 25630636 in words is "twenty-five million, six hundred thirty thousand, six hundred thirty-six".