22147846721 has 64 divisors (see below), whose sum is σ = 31560399360. Its totient is φ = 14958120960.

The previous prime is 22147846709. The next prime is 22147846723. The reversal of 22147846721 is 12764874122.

It is a cyclic number.

It is not a de Polignac number, because 22147846721 - 2⁶ = 22147846657 is a prime.

It is a super-2 number, since 2×22147846721² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22147846723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8660375 + ... + 8662931.

It is an arithmetic number, because the mean of its divisors is an integer number (493131240).

Almost surely, 2^22147846721 is an apocalyptic number.

It is an amenable number.

22147846721 is a deficient number, since it is larger than the sum of its proper divisors (9412552639).

22147846721 is a wasteful number, since it uses less digits than its factorization.

22147846721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114.

The product of its digits is 301056, while the sum is 44.

It can be divided in two parts, 22147 and 846721, that added together give a palindrome (868868).

The spelling of 22147846721 in words is "twenty-two billion, one hundred forty-seven million, eight hundred forty-six thousand, seven hundred twenty-one".