22736721447 has 12 divisors (see below), whose sum is σ = 35827561224. Its totient is φ = 13779831120.

The previous prime is 22736721391. The next prime is 22736721463. The reversal of 22736721447 is 74412763722.

22736721447 is a `hidden beast` number, since 227 + 367 + 21 + 4 + 47 = 666.

It is not a de Polignac number, because 22736721447 - 2⁸ = 22736721191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22736721467) 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 11 ways as a sum of consecutive naturals, for example, 114831828 + ... + 114832025.

It is an arithmetic number, because the mean of its divisors is an integer number (2985630102).

Almost surely, 2^22736721447 is an apocalyptic number.

22736721447 is a deficient number, since it is larger than the sum of its proper divisors (13090839777).

22736721447 is a wasteful number, since it uses less digits than its factorization.

22736721447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229663870 (or 229663867 counting only the distinct ones).

The product of its digits is 790272, while the sum is 45.

The spelling of 22736721447 in words is "twenty-two billion, seven hundred thirty-six million, seven hundred twenty-one thousand, four hundred forty-seven".