20802206 has 4 divisors (see below), whose sum is σ = 31203312. Its totient is φ = 10401102.

The previous prime is 20802167. The next prime is 20802233. The reversal of 20802206 is 60220802.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5200550 + ... + 5200553.

It is an arithmetic number, because the mean of its divisors is an integer number (7800828).

Almost surely, 2^20802206 is an apocalyptic number.

20802206 is a deficient number, since it is larger than the sum of its proper divisors (10401106).

20802206 is a wasteful number, since it uses less digits than its factorization.

20802206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10401105.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20802206 is about 4560.9435427332. The cubic root of 20802206 is about 275.0234955132.

The spelling of 20802206 in words is "twenty million, eight hundred two thousand, two hundred six".