20663325 has 18 divisors (see below), whose sum is σ = 37010714. Its totient is φ = 11020320.

The previous prime is 20663309. The next prime is 20663327. The reversal of 20663325 is 52336602.

20663325 is a `hidden beast` number, since 2 + 0 + 6 + 633 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 251001 + 20412324 = 501^2 + 4518^2 .

It is not a de Polignac number, because 20663325 - 2⁴ = 20663309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663327) 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 17 ways as a sum of consecutive naturals, for example, 45694 + ... + 46143.

Almost surely, 2^20663325 is an apocalyptic number.

20663325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20663325 is a deficient number, since it is larger than the sum of its proper divisors (16347389).

20663325 is a wasteful number, since it uses less digits than its factorization.

20663325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91853 (or 91845 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 20663325 is about 4545.6930164717. The cubic root of 20663325 is about 274.4100853150.

Adding to 20663325 its reverse (52336602), we get a palindrome (72999927).

The spelling of 20663325 in words is "twenty million, six hundred sixty-three thousand, three hundred twenty-five".