18948369 has 16 divisors (see below), whose sum is σ = 28016064. Its totient is φ = 11294400.

The previous prime is 18948359. The next prime is 18948383. The reversal of 18948369 is 96384981.

It is not a de Polignac number, because 18948369 - 2⁹ = 18947857 is a prime.

It is a super-2 number, since 2×18948369² = 718081375520322, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (18948359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2694 + ... + 6719.

It is an arithmetic number, because the mean of its divisors is an integer number (1751004).

Almost surely, 2^18948369 is an apocalyptic number.

It is an amenable number.

18948369 is a deficient number, since it is larger than the sum of its proper divisors (9067695).

18948369 is a wasteful number, since it uses less digits than its factorization.

18948369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9488.

The product of its digits is 373248, while the sum is 48.

The square root of 18948369 is about 4352.9724327177. The cubic root of 18948369 is about 266.5982399084.

The spelling of 18948369 in words is "eighteen million, nine hundred forty-eight thousand, three hundred sixty-nine".