18613212 has 24 divisors (see below), whose sum is σ = 43747200. Its totient is φ = 6159216.

The previous prime is 18613211. The next prime is 18613213. The reversal of 18613212 is 21231681.

It is an interprime number because it is at equal distance from previous prime (18613211) and next prime (18613213).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18613211) 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 7 ways as a sum of consecutive naturals, for example, 3912 + ... + 7247.

It is an arithmetic number, because the mean of its divisors is an integer number (1822800).

Almost surely, 2^18613212 is an apocalyptic number.

18613212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18613212 is an abundant number, since it is smaller than the sum of its proper divisors (25133988).

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

18613212 is a wasteful number, since it uses less digits than its factorization.

18613212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11305 (or 11303 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 18613212 is about 4314.3031882333. The cubic root of 18613212 is about 265.0170251314.

Adding to 18613212 its reverse (21231681), we get a palindrome (39844893).

The spelling of 18613212 in words is "eighteen million, six hundred thirteen thousand, two hundred twelve".