18783212 has 24 divisors (see below), whose sum is σ = 37766400. Its totient is φ = 8007120.

The previous prime is 18783211. The next prime is 18783251. The reversal of 18783212 is 21238781.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18783211) 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, 3887 + ... + 7257.

It is an arithmetic number, because the mean of its divisors is an integer number (1573600).

Almost surely, 2^18783212 is an apocalyptic number.

It is an amenable number.

18783212 is an abundant number, since it is smaller than the sum of its proper divisors (18983188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18783212 is a wasteful number, since it uses less digits than its factorization.

18783212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 3579 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 18783212 is about 4333.9603136162. The cubic root of 18783212 is about 265.8214076229.

The spelling of 18783212 in words is "eighteen million, seven hundred eighty-three thousand, two hundred twelve".