16815996 has 36 divisors (see below), whose sum is σ = 42699384. Its totient is φ = 5580000.

The previous prime is 16815983. The next prime is 16816001. The reversal of 16815996 is 69951861.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8106 + ... + 9966.

It is an arithmetic number, because the mean of its divisors is an integer number (1186094).

Almost surely, 2^16815996 is an apocalyptic number.

It is an amenable number.

16815996 is an abundant number, since it is smaller than the sum of its proper divisors (25883388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16815996 is a wasteful number, since it uses less digits than its factorization.

16815996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 2117 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 16815996 is about 4100.7311543187. The cubic root of 16815996 is about 256.1970934994.

The spelling of 16815996 in words is "sixteen million, eight hundred fifteen thousand, nine hundred ninety-six".