20802223 has 8 divisors (see below), whose sum is σ = 22542128. Its totient is φ = 19082304.

The previous prime is 20802167. The next prime is 20802233. The reversal of 20802223 is 32220802.

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 20802223 - 2¹⁷ = 20671151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20802223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20802233) 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, 2790 + ... + 7027.

It is an arithmetic number, because the mean of its divisors is an integer number (2817766).

Almost surely, 2^20802223 is an apocalyptic number.

20802223 is a deficient number, since it is larger than the sum of its proper divisors (1739905).

20802223 is a wasteful number, since it uses less digits than its factorization.

20802223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9993.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20802223 is about 4560.9454063823. The cubic root of 20802223 is about 275.0235704315.

It can be divided in two parts, 20802 and 223, that added together give a square (21025 = 145²).

The spelling of 20802223 in words is "twenty million, eight hundred two thousand, two hundred twenty-three".