18548446229 has 4 divisors (see below), whose sum is σ = 18852519180. Its totient is φ = 18244373280.

The previous prime is 18548446193. The next prime is 18548446237. The reversal of 18548446229 is 92264484581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92264484581 = 269 ⋅342990649.

It can be written as a sum of positive squares in 2 ways, for example, as 8307411025 + 10241035204 = 91145^2 + 101198^2 .

It is a cyclic number.

It is not a de Polignac number, because 18548446229 - 2¹⁶ = 18548380693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18548443229) 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, 152036384 + ... + 152036505.

It is an arithmetic number, because the mean of its divisors is an integer number (4713129795).

Almost surely, 2^18548446229 is an apocalyptic number.

It is an amenable number.

18548446229 is a deficient number, since it is larger than the sum of its proper divisors (304072951).

18548446229 is an equidigital number, since it uses as much as digits as its factorization.

18548446229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304072950.

The product of its digits is 4423680, while the sum is 53.

The spelling of 18548446229 in words is "eighteen billion, five hundred forty-eight million, four hundred forty-six thousand, two hundred twenty-nine".