20303808 has 56 divisors (see below), whose sum is σ = 61398912. Its totient is φ = 5800704.

The previous prime is 20303807. The next prime is 20303809. The reversal of 20303808 is 80830302.

It is an interprime number because it is at equal distance from previous prime (20303807) and next prime (20303809).

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303807) by changing a digit.

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, 6210 + ... + 8897.

Almost surely, 2^20303808 is an apocalyptic number.

20303808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20303808 is an abundant number, since it is smaller than the sum of its proper divisors (41095104).

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

20303808 is a wasteful number, since it uses less digits than its factorization.

20303808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15129 (or 15119 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20303808 is about 4505.9747003284. The cubic root of 20303808 is about 272.8092967022.

The spelling of 20303808 in words is "twenty million, three hundred three thousand, eight hundred eight".