20499916 has 24 divisors (see below), whose sum is σ = 36542016. Its totient is φ = 10061520.

The previous prime is 20499907. The next prime is 20499929. The reversal of 20499916 is 61999402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90195 + ... + 90421.

It is an arithmetic number, because the mean of its divisors is an integer number (1522584).

Almost surely, 2^20499916 is an apocalyptic number.

It is an amenable number.

20499916 is a deficient number, since it is larger than the sum of its proper divisors (16042100).

20499916 is a wasteful number, since it uses less digits than its factorization.

20499916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 20499916 is about 4527.6832928110. The cubic root of 20499916 is about 273.6848099255.

The spelling of 20499916 in words is "twenty million, four hundred ninety-nine thousand, nine hundred sixteen".