18333212 has 24 divisors (see below), whose sum is σ = 32686080. Its totient is φ = 8996400.

The previous prime is 18333209. The next prime is 18333257. The reversal of 18333212 is 21233381.

It is a super-2 number, since 2×18333212² = 672213324473888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76589 + ... + 76827.

It is an arithmetic number, because the mean of its divisors is an integer number (1361920).

Almost surely, 2^18333212 is an apocalyptic number.

It is an amenable number.

18333212 is a deficient number, since it is larger than the sum of its proper divisors (14352868).

18333212 is a wasteful number, since it uses less digits than its factorization.

18333212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 519 counting only the distinct ones).

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

The square root of 18333212 is about 4281.7300241841. The cubic root of 18333212 is about 263.6814147491.

Adding to 18333212 its reverse (21233381), we get a palindrome (39566593).

It can be divided in two parts, 1833 and 3212, that multiplied together give a triangular number (5887596 = T₃₄₃₁).

The spelling of 18333212 in words is "eighteen million, three hundred thirty-three thousand, two hundred twelve".