20818016 has 12 divisors (see below), whose sum is σ = 40985532. Its totient is φ = 10408992.

The previous prime is 20818009. The next prime is 20818073. The reversal of 20818016 is 61081802.

It is a zygodrome in base 3.

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 as a sum of consecutive naturals, namely, 325250 + ... + 325313.

It is an arithmetic number, because the mean of its divisors is an integer number (3415461).

Almost surely, 2^20818016 is an apocalyptic number.

It is an amenable number.

20818016 is a deficient number, since it is larger than the sum of its proper divisors (20167516).

20818016 is an equidigital number, since it uses as much as digits as its factorization.

20818016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650573 (or 650565 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 20818016 is about 4562.6764075485. The cubic root of 20818016 is about 275.0931519138.

Adding to 20818016 its reverse (61081802), we get a palindrome (81899818).

The spelling of 20818016 in words is "twenty million, eight hundred eighteen thousand, sixteen".