22718166481 has 4 divisors (see below), whose sum is σ = 22718984292. Its totient is φ = 22717348672.

The previous prime is 22718166431. The next prime is 22718166557. The reversal of 22718166481 is 18466181722.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12845955600 + 9872210881 = 113340^2 + 99359^2 .

It is a cyclic number.

It is not a de Polignac number, because 22718166481 - 2¹¹ = 22718164433 is a prime.

It is a super-2 number, since 2×22718166481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22718166431) 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, 365716 + ... + 423301.

It is an arithmetic number, because the mean of its divisors is an integer number (5679746073).

Almost surely, 2^22718166481 is an apocalyptic number.

It is an amenable number.

22718166481 is a deficient number, since it is larger than the sum of its proper divisors (817811).

22718166481 is an equidigital number, since it uses as much as digits as its factorization.

22718166481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817810.

The product of its digits is 258048, while the sum is 46.

The spelling of 22718166481 in words is "twenty-two billion, seven hundred eighteen million, one hundred sixty-six thousand, four hundred eighty-one".