20009308 has 24 divisors (see below), whose sum is σ = 38666880. Its totient is φ = 8983920.

The previous prime is 20009293. The next prime is 20009329. The reversal of 20009308 is 80390002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 913 + ... + 6391.

It is an arithmetic number, because the mean of its divisors is an integer number (1611120).

Almost surely, 2^20009308 is an apocalyptic number.

It is an amenable number.

20009308 is a deficient number, since it is larger than the sum of its proper divisors (18657572).

20009308 is a wasteful number, since it uses less digits than its factorization.

20009308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577 (or 5575 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20009308 is about 4473.1764999830. The cubic root of 20009308 is about 271.4838647939.

The spelling of 20009308 in words is "twenty million, nine thousand, three hundred eight".