20663008 has 24 divisors (see below), whose sum is σ = 40830048. Its totient is φ = 10293504.

The previous prime is 20662979. The next prime is 20663009. The reversal of 20663008 is 80036602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8985 + ... + 11047.

It is an arithmetic number, because the mean of its divisors is an integer number (1701252).

Almost surely, 2^20663008 is an apocalyptic number.

It is an amenable number.

20663008 is a deficient number, since it is larger than the sum of its proper divisors (20167040).

20663008 is a wasteful number, since it uses less digits than its factorization.

20663008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20663008 is about 4545.6581481673. The cubic root of 20663008 is about 274.4086820487.

The spelling of 20663008 in words is "twenty million, six hundred sixty-three thousand, eight".