20663152 has 10 divisors (see below), whose sum is σ = 40034888. Its totient is φ = 10331568.

The previous prime is 20663147. The next prime is 20663173. The reversal of 20663152 is 25136602.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 645708 + ... + 645739.

Almost surely, 2^20663152 is an apocalyptic number.

It is an amenable number.

20663152 is a deficient number, since it is larger than the sum of its proper divisors (19371736).

20663152 is a wasteful number, since it uses less digits than its factorization.

20663152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291455 (or 1291449 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20663152 is about 4545.6739874302. The cubic root of 20663152 is about 274.4093194964.

Adding to 20663152 its reverse (25136602), we get a palindrome (45799754).

The spelling of 20663152 in words is "twenty million, six hundred sixty-three thousand, one hundred fifty-two".