22262778721 has 4 divisors (see below), whose sum is σ = 22736454912. Its totient is φ = 21789102532.

The previous prime is 22262778697. The next prime is 22262778761. The reversal of 22262778721 is 12787726222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22262778721 - 2¹⁹ = 22262254433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22262778761) 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, 236838025 + ... + 236838118.

It is an arithmetic number, because the mean of its divisors is an integer number (5684113728).

Almost surely, 2^22262778721 is an apocalyptic number.

It is an amenable number.

22262778721 is a deficient number, since it is larger than the sum of its proper divisors (473676191).

22262778721 is an equidigital number, since it uses as much as digits as its factorization.

22262778721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473676190.

The product of its digits is 526848, while the sum is 46.

The spelling of 22262778721 in words is "twenty-two billion, two hundred sixty-two million, seven hundred seventy-eight thousand, seven hundred twenty-one".