18241446722 has 4 divisors (see below), whose sum is σ = 27362170086. Its totient is φ = 9120723360.

The previous prime is 18241446721. The next prime is 18241446737. The reversal of 18241446722 is 22764414281.

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

It can be written as a sum of positive squares in only one way, i.e., 15102197881 + 3139248841 = 122891^2 + 56029^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18241446722.

It is not an unprimeable number, because it can be changed into a prime (18241446721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560361679 + ... + 4560361682.

Almost surely, 2^18241446722 is an apocalyptic number.

18241446722 is a deficient number, since it is larger than the sum of its proper divisors (9120723364).

18241446722 is an equidigital number, since it uses as much as digits as its factorization.

18241446722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9120723363.

The product of its digits is 172032, while the sum is 41.

The spelling of 18241446722 in words is "eighteen billion, two hundred forty-one million, four hundred forty-six thousand, seven hundred twenty-two".