20312222 has 8 divisors (see below), whose sum is σ = 34820976. Its totient is φ = 8705232.

The previous prime is 20312221. The next prime is 20312233. The reversal of 20312222 is 22221302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 1450873 = 20312222 / (2 + 0 + 3 + 1 + 2 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20312197 and 20312206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725423 + ... + 725450.

It is an arithmetic number, because the mean of its divisors is an integer number (4352622).

Almost surely, 2^20312222 is an apocalyptic number.

20312222 is a deficient number, since it is larger than the sum of its proper divisors (14508754).

20312222 is a wasteful number, since it uses less digits than its factorization.

20312222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450882.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20312222 is about 4506.9082528936. The cubic root of 20312222 is about 272.8469760120.

Adding to 20312222 its reverse (22221302), we get a palindrome (42533524).

The spelling of 20312222 in words is "twenty million, three hundred twelve thousand, two hundred twenty-two".