18345222549 has 48 divisors (see below), whose sum is σ = 28494385920. Its totient is φ = 11780717760.

The previous prime is 18345222521. The next prime is 18345222559. The reversal of 18345222549 is 94522254381.

18345222549 is a `hidden beast` number, since 1 + 8 + 34 + 52 + 22 + 549 = 666.

It is not a de Polignac number, because 18345222549 - 2¹⁶ = 18345157013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345222509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3245844 + ... + 3251490.

It is an arithmetic number, because the mean of its divisors is an integer number (593633040).

Almost surely, 2^18345222549 is an apocalyptic number.

It is an amenable number.

18345222549 is a deficient number, since it is larger than the sum of its proper divisors (10149163371).

18345222549 is an equidigital number, since it uses as much as digits as its factorization.

18345222549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6152 (or 6140 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 18345222549 in words is "eighteen billion, three hundred forty-five million, two hundred twenty-two thousand, five hundred forty-nine".