18212333 has 2 divisors, whose sum is σ = 18212334. Its totient is φ = 18212332.

The previous prime is 18212303. The next prime is 18212347. The reversal of 18212333 is 33321281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10355524 + 7856809 = 3218^2 + 2803^2 .

It is a cyclic number.

It is not a de Polignac number, because 18212333 - 2¹⁰ = 18211309 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18212299 and 18212308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18212303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9106166 + 9106167.

It is an arithmetic number, because the mean of its divisors is an integer number (9106167).

Almost surely, 2^18212333 is an apocalyptic number.

It is an amenable number.

18212333 is a deficient number, since it is larger than the sum of its proper divisors (1).

18212333 is an equidigital number, since it uses as much as digits as its factorization.

18212333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 18212333 is about 4267.5910066453. The cubic root of 18212333 is about 263.1006135305.

The spelling of 18212333 in words is "eighteen million, two hundred twelve thousand, three hundred thirty-three".