20773816 has 32 divisors (see below), whose sum is σ = 45555840. Its totient is φ = 8695008.

The previous prime is 20773793. The next prime is 20773871. The reversal of 20773816 is 61837702.

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, 1906 + ... + 6721.

It is an arithmetic number, because the mean of its divisors is an integer number (1423620).

Almost surely, 2^20773816 is an apocalyptic number.

It is an amenable number.

20773816 is an abundant number, since it is smaller than the sum of its proper divisors (24782024).

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

20773816 is a wasteful number, since it uses less digits than its factorization.

20773816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683 (or 8679 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 20773816 is about 4557.8301855159. The cubic root of 20773816 is about 274.8983249470.

The spelling of 20773816 in words is "twenty million, seven hundred seventy-three thousand, eight hundred sixteen".