18213833 has 12 divisors (see below), whose sum is σ = 20543184. Its totient is φ = 16014600.

The previous prime is 18213829. The next prime is 18213857. The reversal of 18213833 is 33831281.

It is not a de Polignac number, because 18213833 - 2² = 18213829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18213796 and 18213805.

It is not an unprimeable number, because it can be changed into a prime (18213803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9710 + ... + 11432.

It is an arithmetic number, because the mean of its divisors is an integer number (1711932).

Almost surely, 2^18213833 is an apocalyptic number.

It is an amenable number.

18213833 is a deficient number, since it is larger than the sum of its proper divisors (2329351).

18213833 is a wasteful number, since it uses less digits than its factorization.

18213833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796 (or 1765 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 18213833 is about 4267.7667462035. The cubic root of 18213833 is about 263.1078364763.

The spelling of 18213833 in words is "eighteen million, two hundred thirteen thousand, eight hundred thirty-three".