18212712 has 96 divisors (see below), whose sum is σ = 56142720. Its totient is φ = 4892160.

The previous prime is 18212683. The next prime is 18212731. The reversal of 18212712 is 21721281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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 23 ways as a sum of consecutive naturals, for example, 19537 + ... + 20447.

It is an arithmetic number, because the mean of its divisors is an integer number (584820).

Almost surely, 2^18212712 is an apocalyptic number.

18212712 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 18212712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28071360).

18212712 is an abundant number, since it is smaller than the sum of its proper divisors (37930008).

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

18212712 is a wasteful number, since it uses less digits than its factorization.

18212712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 940 counting only the distinct ones).

The product of its digits is 448, while the sum is 24.

The square root of 18212712 is about 4267.6354108569. The cubic root of 18212712 is about 263.1024385656.

Adding to 18212712 its reverse (21721281), we get a palindrome (39933993).

The spelling of 18212712 in words is "eighteen million, two hundred twelve thousand, seven hundred twelve".