20005338 has 8 divisors (see below), whose sum is σ = 40010688. Its totient is φ = 6668444.

The previous prime is 20005319. The next prime is 20005343. The reversal of 20005338 is 83350002.

It is a sphenic number, since it is the product of 3 distinct primes.

20005338 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 1667106 + ... + 1667117.

It is an arithmetic number, because the mean of its divisors is an integer number (5001336).

Almost surely, 2^20005338 is an apocalyptic number.

20005338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20005338 is a wasteful number, since it uses less digits than its factorization.

20005338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334228.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20005338 is about 4472.7327217262. The cubic root of 20005338 is about 271.4659087801.

The spelling of 20005338 in words is "twenty million, five thousand, three hundred thirty-eight".