20663896 has 24 divisors (see below), whose sum is σ = 42589260. Its totient is φ = 9392240.

The previous prime is 20663861. The next prime is 20663927. The reversal of 20663896 is 69836602.

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 in 5 ways as a sum of consecutive naturals, for example, 9706 + ... + 11641.

Almost surely, 2^20663896 is an apocalyptic number.

It is an amenable number.

20663896 is an abundant number, since it is smaller than the sum of its proper divisors (21925364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20663896 is a wasteful number, since it uses less digits than its factorization.

20663896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21375 (or 21360 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 20663896 is about 4545.7558227428. The cubic root of 20663896 is about 274.4126129288.

The spelling of 20663896 in words is "twenty million, six hundred sixty-three thousand, eight hundred ninety-six".