22220188387 has 4 divisors (see below), whose sum is σ = 22224972600. Its totient is φ = 22215404176.

The previous prime is 22220188337. The next prime is 22220188391. The reversal of 22220188387 is 78388102222.

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

It is a cyclic number.

It is not a de Polignac number, because 22220188387 - 2¹⁵ = 22220155619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220188307) 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, 2385133 + ... + 2394430.

It is an arithmetic number, because the mean of its divisors is an integer number (5556243150).

Almost surely, 2^22220188387 is an apocalyptic number.

22220188387 is a deficient number, since it is larger than the sum of its proper divisors (4784213).

22220188387 is an equidigital number, since it uses as much as digits as its factorization.

22220188387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4784212.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 22220188387 in words is "twenty-two billion, two hundred twenty million, one hundred eighty-eight thousand, three hundred eighty-seven".