16921874 has 8 divisors (see below), whose sum is σ = 25688880. Its totient is φ = 8358916.

The previous prime is 16921867. The next prime is 16921901. The reversal of 16921874 is 47812961.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50804 + ... + 51135.

It is an arithmetic number, because the mean of its divisors is an integer number (3211110).

Almost surely, 2^16921874 is an apocalyptic number.

16921874 is a deficient number, since it is larger than the sum of its proper divisors (8767006).

16921874 is a wasteful number, since it uses less digits than its factorization.

16921874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102024.

The product of its digits is 24192, while the sum is 38.

The square root of 16921874 is about 4113.6205464287. The cubic root of 16921874 is about 256.7336640379.

The spelling of 16921874 in words is "sixteen million, nine hundred twenty-one thousand, eight hundred seventy-four".