20222222187 has 4 divisors (see below), whose sum is σ = 26962962920. Its totient is φ = 13481481456.

The previous prime is 20222222113. The next prime is 20222222213. The reversal of 20222222187 is 78122222202.

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

It is not a de Polignac number, because 20222222187 - 2¹² = 20222218091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222222107) 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, 3370370362 + ... + 3370370367.

It is an arithmetic number, because the mean of its divisors is an integer number (6740740730).

Almost surely, 2^20222222187 is an apocalyptic number.

20222222187 is a deficient number, since it is larger than the sum of its proper divisors (6740740733).

20222222187 is an equidigital number, since it uses as much as digits as its factorization.

20222222187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740740732.

The product of its (nonzero) digits is 7168, while the sum is 30.

Adding to 20222222187 its reverse (78122222202), we get a palindrome (98344444389).

The spelling of 20222222187 in words is "twenty billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred eighty-seven".