20272222 has 4 divisors (see below), whose sum is σ = 30408336. Its totient is φ = 10136110.

The previous prime is 20272207. The next prime is 20272229. The reversal of 20272222 is 22227202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20272222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20272229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5068054 + ... + 5068057.

It is an arithmetic number, because the mean of its divisors is an integer number (7602084).

Almost surely, 2^20272222 is an apocalyptic number.

20272222 is a deficient number, since it is larger than the sum of its proper divisors (10136114).

20272222 is a wasteful number, since it uses less digits than its factorization.

20272222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10136113.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 20272222 is about 4502.4684340926. The cubic root of 20272222 is about 272.6677563125.

Adding to 20272222 its reverse (22227202), we get a palindrome (42499424).

The spelling of 20272222 in words is "twenty million, two hundred seventy-two thousand, two hundred twenty-two".