16446813 has 8 divisors (see below), whose sum is σ = 21948288. Its totient is φ = 10954944.

The previous prime is 16446797. The next prime is 16446821. The reversal of 16446813 is 31864461.

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

It is not a de Polignac number, because 16446813 - 2⁴ = 16446797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16446823) 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 7 ways as a sum of consecutive naturals, for example, 4156 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (2743536).

Almost surely, 2^16446813 is an apocalyptic number.

It is an amenable number.

16446813 is a deficient number, since it is larger than the sum of its proper divisors (5501475).

16446813 is a wasteful number, since it uses less digits than its factorization.

16446813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803.

The product of its digits is 13824, while the sum is 33.

The square root of 16446813 is about 4055.4670507847. The cubic root of 16446813 is about 254.3083293531.

The spelling of 16446813 in words is "sixteen million, four hundred forty-six thousand, eight hundred thirteen".