20616828 has 12 divisors (see below), whose sum is σ = 48105960. Its totient is φ = 6872272.

The previous prime is 20616803. The next prime is 20616863. The reversal of 20616828 is 82861602.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859023 + ... + 859046.

It is an arithmetic number, because the mean of its divisors is an integer number (4008830).

Almost surely, 2^20616828 is an apocalyptic number.

It is an amenable number.

20616828 is an abundant number, since it is smaller than the sum of its proper divisors (27489132).

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

20616828 is a wasteful number, since it uses less digits than its factorization.

20616828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718076 (or 1718074 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20616828 is about 4540.5757344196. The cubic root of 20616828 is about 274.2041031690.

The spelling of 20616828 in words is "twenty million, six hundred sixteen thousand, eight hundred twenty-eight".