16801816 has 8 divisors (see below), whose sum is σ = 31503420. Its totient is φ = 8400904.

The previous prime is 16801793. The next prime is 16801819. The reversal of 16801816 is 61810861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16801819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050106 + ... + 1050121.

Almost surely, 2^16801816 is an apocalyptic number.

It is an amenable number.

16801816 is a deficient number, since it is larger than the sum of its proper divisors (14701604).

16801816 is a wasteful number, since it uses less digits than its factorization.

16801816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100233 (or 2100229 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 16801816 is about 4099.0018297142. The cubic root of 16801816 is about 256.1250609657.

The spelling of 16801816 in words is "sixteen million, eight hundred one thousand, eight hundred sixteen".