20430208 has 32 divisors (see below), whose sum is σ = 40961160. Its totient is φ = 10149888.

The previous prime is 20430191. The next prime is 20430251. The reversal of 20430208 is 80203402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 24291 + ... + 25117.

Almost surely, 2^20430208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20480580).

20430208 is an abundant number, since it is smaller than the sum of its proper divisors (20530952).

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

20430208 is an equidigital number, since it uses as much as digits as its factorization.

20430208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20430208 is about 4519.9787610120. The cubic root of 20430208 is about 273.3742446529.

The spelling of 20430208 in words is "twenty million, four hundred thirty thousand, two hundred eight".