16445974 has 4 divisors (see below), whose sum is σ = 24668964. Its totient is φ = 8222986.

The previous prime is 16445969. The next prime is 16445977. The reversal of 16445974 is 47954461.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16445977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4111492 + ... + 4111495.

It is an arithmetic number, because the mean of its divisors is an integer number (6167241).

Almost surely, 2^16445974 is an apocalyptic number.

16445974 is a deficient number, since it is larger than the sum of its proper divisors (8222990).

16445974 is an equidigital number, since it uses as much as digits as its factorization.

16445974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8222989.

The product of its digits is 120960, while the sum is 40.

The square root of 16445974 is about 4055.3636088519. The cubic root of 16445974 is about 254.3040049426.

The spelling of 16445974 in words is "sixteen million, four hundred forty-five thousand, nine hundred seventy-four".