16653394 has 4 divisors (see below), whose sum is σ = 24980094. Its totient is φ = 8326696.

The previous prime is 16653379. The next prime is 16653397. The reversal of 16653394 is 49335661.

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

It can be written as a sum of positive squares in only one way, i.e., 10478169 + 6175225 = 3237^2 + 2485^2 .

It is not an unprimeable number, because it can be changed into a prime (16653397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4163347 + ... + 4163350.

Almost surely, 2^16653394 is an apocalyptic number.

16653394 is a deficient number, since it is larger than the sum of its proper divisors (8326700).

16653394 is an equidigital number, since it uses as much as digits as its factorization.

16653394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326699.

The product of its digits is 58320, while the sum is 37.

The square root of 16653394 is about 4080.8570178334. The cubic root of 16653394 is about 255.3686529927.

The spelling of 16653394 in words is "sixteen million, six hundred fifty-three thousand, three hundred ninety-four".