20816677 has 8 divisors (see below), whose sum is σ = 24180992. Its totient is φ = 17550000.

The previous prime is 20816669. The next prime is 20816689. The reversal of 20816677 is 77661802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20816677 - 2³ = 20816669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20816617) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23949 + ... + 24802.

It is an arithmetic number, because the mean of its divisors is an integer number (3022624).

Almost surely, 2^20816677 is an apocalyptic number.

It is an amenable number.

20816677 is a deficient number, since it is larger than the sum of its proper divisors (3364315).

20816677 is an equidigital number, since it uses as much as digits as its factorization.

20816677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48819.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 20816677 is about 4562.5296711364. The cubic root of 20816677 is about 275.0872538553.

The spelling of 20816677 in words is "twenty million, eight hundred sixteen thousand, six hundred seventy-seven".