16380305 has 4 divisors (see below), whose sum is σ = 19656372. Its totient is φ = 13104240.

The previous prime is 16380289. The next prime is 16380313. The reversal of 16380305 is 50308361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2534464 + 13845841 = 1592^2 + 3721^2 .

It is not a de Polignac number, because 16380305 - 2⁴ = 16380289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638026 + ... + 1638035.

It is an arithmetic number, because the mean of its divisors is an integer number (4914093).

Almost surely, 2^16380305 is an apocalyptic number.

It is an amenable number.

16380305 is a deficient number, since it is larger than the sum of its proper divisors (3276067).

16380305 is an equidigital number, since it uses as much as digits as its factorization.

16380305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276066.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16380305 is about 4047.2589489678. The cubic root of 16380305 is about 253.9650736278.

Adding to 16380305 its reverse (50308361), we get a palindrome (66688666).

The spelling of 16380305 in words is "sixteen million, three hundred eighty thousand, three hundred five".