18267072 has 56 divisors (see below), whose sum is σ = 48920400. Its totient is φ = 6014976.

The previous prime is 18267047. The next prime is 18267079. The reversal of 18267072 is 27076281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18267079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16554 + ... + 17622.

Almost surely, 2^18267072 is an apocalyptic number.

18267072 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 18267072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24460200).

18267072 is an abundant number, since it is smaller than the sum of its proper divisors (30653328).

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

18267072 is a wasteful number, since it uses less digits than its factorization.

18267072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 18267072 is about 4273.9995320543. Note that the first 3 decimals coincide. The cubic root of 18267072 is about 263.3639416788.

The spelling of 18267072 in words is "eighteen million, two hundred sixty-seven thousand, seventy-two".