16920193 has 4 divisors (see below), whose sum is σ = 16929108. Its totient is φ = 16911280.

The previous prime is 16920191. The next prime is 16920217. The reversal of 16920193 is 39102961.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1803649 + 15116544 = 1343^2 + 3888^2 .

It is a cyclic number.

It is not a de Polignac number, because 16920193 - 2¹ = 16920191 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16920191) 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, 346 + ... + 5827.

It is an arithmetic number, because the mean of its divisors is an integer number (4232277).

Almost surely, 2^16920193 is an apocalyptic number.

It is an amenable number.

16920193 is a deficient number, since it is larger than the sum of its proper divisors (8915).

16920193 is an equidigital number, since it uses as much as digits as its factorization.

16920193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8914.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 16920193 is about 4113.4162201265. The cubic root of 16920193 is about 256.7251625449.

The spelling of 16920193 in words is "sixteen million, nine hundred twenty thousand, one hundred ninety-three".