20802773 has 8 divisors (see below), whose sum is σ = 21607680. Its totient is φ = 20003760.

The previous prime is 20802757. The next prime is 20802779. The reversal of 20802773 is 37720802.

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 20802773 - 2⁴ = 20802757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20802779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6536 + ... + 9182.

It is an arithmetic number, because the mean of its divisors is an integer number (2700960).

Almost surely, 2^20802773 is an apocalyptic number.

It is an amenable number.

20802773 is a deficient number, since it is larger than the sum of its proper divisors (804907).

20802773 is a wasteful number, since it uses less digits than its factorization.

20802773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 20802773 is about 4561.0057005007. The cubic root of 20802773 is about 275.0259942370.

The spelling of 20802773 in words is "twenty million, eight hundred two thousand, seven hundred seventy-three".