22000221987 has 4 divisors (see below), whose sum is σ = 29333629320. Its totient is φ = 14666814656.

The previous prime is 22000221983. The next prime is 22000221989. The reversal of 22000221987 is 78912200022.

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 22000221987 - 2² = 22000221983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22000221983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3666703662 + ... + 3666703667.

It is an arithmetic number, because the mean of its divisors is an integer number (7333407330).

Almost surely, 2^22000221987 is an apocalyptic number.

22000221987 is a deficient number, since it is larger than the sum of its proper divisors (7333407333).

22000221987 is an equidigital number, since it uses as much as digits as its factorization.

22000221987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333407332.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 22000221987 in words is "twenty-two billion, two hundred twenty-one thousand, nine hundred eighty-seven".