20663308 has 12 divisors (see below), whose sum is σ = 36567720. Its totient is φ = 10215392.

The previous prime is 20663273. The next prime is 20663309. The reversal of 20663308 is 80336602.

It is not an unprimeable number, because it can be changed into a prime (20663309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28666 + ... + 29377.

It is an arithmetic number, because the mean of its divisors is an integer number (3047310).

Almost surely, 2^20663308 is an apocalyptic number.

It is an amenable number.

20663308 is a deficient number, since it is larger than the sum of its proper divisors (15904412).

20663308 is a wasteful number, since it uses less digits than its factorization.

20663308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58136 (or 58134 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20663308 is about 4545.6911465695. The cubic root of 20663308 is about 274.4100100613.

The spelling of 20663308 in words is "twenty million, six hundred sixty-three thousand, three hundred eight".