18267012 has 48 divisors (see below), whose sum is σ = 47980800. Its totient is φ = 6009120.

The previous prime is 18267001. The next prime is 18267019. The reversal of 18267012 is 21076281.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18267019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7462 + ... + 9602.

It is an arithmetic number, because the mean of its divisors is an integer number (999600).

Almost surely, 2^18267012 is an apocalyptic number.

18267012 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 18267012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23990400).

18267012 is an abundant number, since it is smaller than the sum of its proper divisors (29713788).

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

18267012 is a wasteful number, since it uses less digits than its factorization.

18267012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 18267012 is about 4273.9925128619. The cubic root of 18267012 is about 263.3636533302.

The spelling of 18267012 in words is "eighteen million, two hundred sixty-seven thousand, twelve".