20655716 has 12 divisors (see below), whose sum is σ = 36205932. Its totient is φ = 10311168.

The previous prime is 20655707. The next prime is 20655737. The reversal of 20655716 is 61755602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9897316 + 10758400 = 3146^2 + 3280^2 .

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 3 ways as a sum of consecutive naturals, for example, 1145 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (3017161).

Almost surely, 2^20655716 is an apocalyptic number.

It is an amenable number.

20655716 is a deficient number, since it is larger than the sum of its proper divisors (15550216).

20655716 is a wasteful number, since it uses less digits than its factorization.

20655716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8350 (or 8348 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 20655716 is about 4544.8559933182. The cubic root of 20655716 is about 274.3763985345.

The spelling of 20655716 in words is "twenty million, six hundred fifty-five thousand, seven hundred sixteen".