16921694 has 8 divisors (see below), whose sum is σ = 25441680. Its totient is φ = 8441136.

The previous prime is 16921687. The next prime is 16921699. The reversal of 16921694 is 49612961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16921699) 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, 8759 + ... + 10514.

It is an arithmetic number, because the mean of its divisors is an integer number (3180210).

Almost surely, 2^16921694 is an apocalyptic number.

16921694 is a deficient number, since it is larger than the sum of its proper divisors (8519986).

16921694 is a wasteful number, since it uses less digits than its factorization.

16921694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19714.

The product of its digits is 23328, while the sum is 38.

The square root of 16921694 is about 4113.5986678333. The cubic root of 16921694 is about 256.7327537325.

It can be divided in two parts, 1692169 and 4, that multiplied together give a palindrome (6768676).

The spelling of 16921694 in words is "sixteen million, nine hundred twenty-one thousand, six hundred ninety-four".