18222349649 has 8 divisors (see below), whose sum is σ = 21268639488. Its totient is φ = 15286834080.

The previous prime is 18222349643. The next prime is 18222349667. The reversal of 18222349649 is 94694322281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18222349649 - 2²⁴ = 18205572433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18222349597 and 18222349606.

It is not an unprimeable number, because it can be changed into a prime (18222349643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27693212 + ... + 27693869.

It is an arithmetic number, because the mean of its divisors is an integer number (2658579936).

Almost surely, 2^18222349649 is an apocalyptic number.

It is an amenable number.

18222349649 is a deficient number, since it is larger than the sum of its proper divisors (3046289839).

18222349649 is an equidigital number, since it uses as much as digits as its factorization.

18222349649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55387135.

The product of its digits is 1492992, while the sum is 50.

The spelling of 18222349649 in words is "eighteen billion, two hundred twenty-two million, three hundred forty-nine thousand, six hundred forty-nine".