20306608 has 40 divisors (see below), whose sum is σ = 46925568. Its totient is φ = 8323392.

The previous prime is 20306597. The next prime is 20306617. The reversal of 20306608 is 80660302.

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 7 ways as a sum of consecutive naturals, for example, 1366 + ... + 6517.

Almost surely, 2^20306608 is an apocalyptic number.

20306608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20306608 is an abundant number, since it is smaller than the sum of its proper divisors (26618960).

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

20306608 is a wasteful number, since it uses less digits than its factorization.

20306608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7921 (or 7915 counting only the distinct ones).

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

The square root of 20306608 is about 4506.2853882106. The cubic root of 20306608 is about 272.8218367295.

The spelling of 20306608 in words is "twenty million, three hundred six thousand, six hundred eight".