18061212 has 24 divisors (see below), whose sum is σ = 45384976. Its totient is φ = 5557248.

The previous prime is 18061201. The next prime is 18061223. The reversal of 18061212 is 21216081.

It is an interprime number because it is at equal distance from previous prime (18061201) and next prime (18061223).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57733 + ... + 58044.

Almost surely, 2^18061212 is an apocalyptic number.

18061212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18061212 is an abundant number, since it is smaller than the sum of its proper divisors (27323764).

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

18061212 is a wasteful number, since it uses less digits than its factorization.

18061212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115797 (or 115795 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 18061212 is about 4249.8484678868. The cubic root of 18061212 is about 262.3708789007.

Adding to 18061212 its reverse (21216081), we get a palindrome (39277293).

The spelling of 18061212 in words is "eighteen million, sixty-one thousand, two hundred twelve".