16820338 has 8 divisors (see below), whose sum is σ = 25480620. Its totient is φ = 8326800.

The previous prime is 16820333. The next prime is 16820341. The reversal of 16820338 is 83302861.

It can be written as a sum of positive squares in 2 ways, for example, as 11744329 + 5076009 = 3427^2 + 2253^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16820333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41433 + ... + 41836.

Almost surely, 2^16820338 is an apocalyptic number.

16820338 is a deficient number, since it is larger than the sum of its proper divisors (8660282).

16820338 is a wasteful number, since it uses less digits than its factorization.

16820338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83372.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 16820338 is about 4101.2605379322. The cubic root of 16820338 is about 256.2191421894.

The spelling of 16820338 in words is "sixteen million, eight hundred twenty thousand, three hundred thirty-eight".