18234719 has 8 divisors (see below), whose sum is σ = 18527520. Its totient is φ = 17944416.

The previous prime is 18234691. The next prime is 18234721. The reversal of 18234719 is 91743281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18234719 - 2¹² = 18230623 is a prime.

It is a super-2 number, since 2×18234719² = 665009954017922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18234779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18374 + ... + 19340.

It is an arithmetic number, because the mean of its divisors is an integer number (2315940).

Almost surely, 2^18234719 is an apocalyptic number.

18234719 is a deficient number, since it is larger than the sum of its proper divisors (292801).

18234719 is a wasteful number, since it uses less digits than its factorization.

18234719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249.

The product of its digits is 12096, while the sum is 35.

The square root of 18234719 is about 4270.2129923459. The cubic root of 18234719 is about 263.2083675967.

The spelling of 18234719 in words is "eighteen million, two hundred thirty-four thousand, seven hundred nineteen".