20855222 has 4 divisors (see below), whose sum is σ = 31282836. Its totient is φ = 10427610.

The previous prime is 20855221. The next prime is 20855231. The reversal of 20855222 is 22255802.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20855191 and 20855200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20855221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5213804 + ... + 5213807.

It is an arithmetic number, because the mean of its divisors is an integer number (7820709).

Almost surely, 2^20855222 is an apocalyptic number.

20855222 is a deficient number, since it is larger than the sum of its proper divisors (10427614).

20855222 is a wasteful number, since it uses less digits than its factorization.

20855222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10427613.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20855222 is about 4566.7517996931. The cubic root of 20855222 is about 275.2569367248.

The spelling of 20855222 in words is "twenty million, eight hundred fifty-five thousand, two hundred twenty-two".