16694381 has 4 divisors (see below), whose sum is σ = 18212064. Its totient is φ = 15176700.

The previous prime is 16694351. The next prime is 16694383. The reversal of 16694381 is 18349661.

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.

It is not a de Polignac number, because 16694381 - 2²² = 12500077 is a prime.

It is a super-2 number, since 2×16694381² = 557404713946322, 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 (16694383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758825 + ... + 758846.

It is an arithmetic number, because the mean of its divisors is an integer number (4553016).

Almost surely, 2^16694381 is an apocalyptic number.

16694381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16694381 is a deficient number, since it is larger than the sum of its proper divisors (1517683).

16694381 is a wasteful number, since it uses less digits than its factorization.

16694381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517682.

The product of its digits is 31104, while the sum is 38.

The square root of 16694381 is about 4085.8757935111. The cubic root of 16694381 is about 255.5779840919.

The spelling of 16694381 in words is "sixteen million, six hundred ninety-four thousand, three hundred eighty-one".