16045813 has 4 divisors (see below), whose sum is σ = 18338080. Its totient is φ = 13753548.

The previous prime is 16045811. The next prime is 16045829. The reversal of 16045813 is 31854061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31854061 = 73 ⋅436357.

It is a cyclic number.

It is not a de Polignac number, because 16045813 - 2¹ = 16045811 is a prime.

It is a super-2 number, since 2×16045813² = 514936229661938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16045811) 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, 1146123 + ... + 1146136.

It is an arithmetic number, because the mean of its divisors is an integer number (4584520).

Almost surely, 2^16045813 is an apocalyptic number.

It is an amenable number.

16045813 is a deficient number, since it is larger than the sum of its proper divisors (2292267).

16045813 is an equidigital number, since it uses as much as digits as its factorization.

16045813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292266.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 16045813 is about 4005.7225315790. The cubic root of 16045813 is about 252.2244839776.

Adding to 16045813 its reverse (31854061), we get a palindrome (47899874).

The spelling of 16045813 in words is "sixteen million, forty-five thousand, eight hundred thirteen".