18242619 has 4 divisors (see below), whose sum is σ = 24323496. Its totient is φ = 12161744.

The previous prime is 18242617. The next prime is 18242629. The reversal of 18242619 is 91624281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18242619 - 2¹ = 18242617 is a prime.

It is a super-2 number, since 2×18242619² = 665586295958322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18242619.

It is not an unprimeable number, because it can be changed into a prime (18242617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3040434 + ... + 3040439.

It is an arithmetic number, because the mean of its divisors is an integer number (6080874).

Almost surely, 2^18242619 is an apocalyptic number.

18242619 is a deficient number, since it is larger than the sum of its proper divisors (6080877).

18242619 is an equidigital number, since it uses as much as digits as its factorization.

18242619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6080876.

The product of its digits is 6912, while the sum is 33.

The square root of 18242619 is about 4271.1379045870. The cubic root of 18242619 is about 263.2463728601.

The spelling of 18242619 in words is "eighteen million, two hundred forty-two thousand, six hundred nineteen".