20533222 has 16 divisors (see below), whose sum is σ = 32274432. Its totient is φ = 9785160.

The previous prime is 20533213. The next prime is 20533223. The reversal of 20533222 is 22233502.

It is a super-2 number, since 2×20533222² = 843226411402568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20533222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533223) 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, 1683 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (2017152).

Almost surely, 2^20533222 is an apocalyptic number.

20533222 is a deficient number, since it is larger than the sum of its proper divisors (11741210).

20533222 is a wasteful number, since it uses less digits than its factorization.

20533222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20533222 is about 4531.3598400480. The cubic root of 20533222 is about 273.8329473487.

Adding to 20533222 its reverse (22233502), we get a palindrome (42766724).

The spelling of 20533222 in words is "twenty million, five hundred thirty-three thousand, two hundred twenty-two".