18373212 has 144 divisors (see below), whose sum is σ = 56504448. Its totient is φ = 4959360.

The previous prime is 18373189. The next prime is 18373219. The reversal of 18373212 is 21237381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18373219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221323 + ... + 221405.

It is an arithmetic number, because the mean of its divisors is an integer number (392392).

Almost surely, 2^18373212 is an apocalyptic number.

18373212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18373212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28252224).

18373212 is an abundant number, since it is smaller than the sum of its proper divisors (38131236).

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

18373212 is a wasteful number, since it uses less digits than its factorization.

18373212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 155 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 18373212 is about 4286.3984882416. The cubic root of 18373212 is about 263.8730450190.

The spelling of 18373212 in words is "eighteen million, three hundred seventy-three thousand, two hundred twelve".