18248948369 has 4 divisors (see below), whose sum is σ = 18249442596. Its totient is φ = 18248454144.

The previous prime is 18248948329. The next prime is 18248948477. The reversal of 18248948369 is 96384984281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96384984281 = 259213 ⋅371837.

It can be written as a sum of positive squares in 2 ways, for example, as 4019560000 + 14229388369 = 63400^2 + 119287^2 .

It is a cyclic number.

It is not a de Polignac number, because 18248948369 - 2¹⁶ = 18248882833 is a prime.

It is a super-2 number, since 2×18248948369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18248948329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186824 + ... + 267209.

It is an arithmetic number, because the mean of its divisors is an integer number (4562360649).

Almost surely, 2^18248948369 is an apocalyptic number.

It is an amenable number.

18248948369 is a deficient number, since it is larger than the sum of its proper divisors (494227).

18248948369 is an equidigital number, since it uses as much as digits as its factorization.

18248948369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494226.

The product of its digits is 23887872, while the sum is 62.

The spelling of 18248948369 in words is "eighteen billion, two hundred forty-eight million, nine hundred forty-eight thousand, three hundred sixty-nine".