20816016 has 40 divisors (see below), whose sum is σ = 57912960. Its totient is φ = 6404736.

The previous prime is 20816009. The next prime is 20816021. The reversal of 20816016 is 61061802.

It is a super-2 number, since 2×20816016² = 866613044224512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16056 + ... + 17303.

It is an arithmetic number, because the mean of its divisors is an integer number (1447824).

Almost surely, 2^20816016 is an apocalyptic number.

20816016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20816016 is an abundant number, since it is smaller than the sum of its proper divisors (37096944).

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

20816016 is a wasteful number, since it uses less digits than its factorization.

20816016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33383 (or 33377 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20816016 is about 4562.4572326763. The cubic root of 20816016 is about 275.0843421738.

Adding to 20816016 its reverse (61061802), we get a palindrome (81877818).

The spelling of 20816016 in words is "twenty million, eight hundred sixteen thousand, sixteen".