16683509338 has 4 divisors (see below), whose sum is σ = 25025264010. Its totient is φ = 8341754668.

The previous prime is 16683509281. The next prime is 16683509347. The reversal of 16683509338 is 83390538661.

16683509338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83390538661 = 19 ⋅4388975719.

It can be written as a sum of positive squares in only one way, i.e., 12638930929 + 4044578409 = 112423^2 + 63597^2 .

It is a super-2 number, since 2×16683509338² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4170877333 + ... + 4170877336.

Almost surely, 2^16683509338 is an apocalyptic number.

16683509338 is a deficient number, since it is larger than the sum of its proper divisors (8341754672).

16683509338 is an equidigital number, since it uses as much as digits as its factorization.

16683509338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8341754671.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 16683509338 in words is "sixteen billion, six hundred eighty-three million, five hundred nine thousand, three hundred thirty-eight".