16681193 has 12 divisors (see below), whose sum is σ = 17751552. Its totient is φ = 15651960.

The previous prime is 16681139. The next prime is 16681207. The reversal of 16681193 is 39118661.

It is not a de Polignac number, because 16681193 - 2¹⁶ = 16615657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16681103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155846 + ... + 155952.

It is an arithmetic number, because the mean of its divisors is an integer number (1479296).

Almost surely, 2^16681193 is an apocalyptic number.

It is an amenable number.

16681193 is a deficient number, since it is larger than the sum of its proper divisors (1070359).

16681193 is an equidigital number, since it uses as much as digits as its factorization.

16681193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 185 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 16681193 is about 4084.2616223744. The cubic root of 16681193 is about 255.5106670230.

The spelling of 16681193 in words is "sixteen million, six hundred eighty-one thousand, one hundred ninety-three".