18356072 has 64 divisors (see below), whose sum is σ = 41472000. Its totient is φ = 7451136.

The previous prime is 18356027. The next prime is 18356099. The reversal of 18356072 is 27065381.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144473 + ... + 144599.

It is an arithmetic number, because the mean of its divisors is an integer number (648000).

Almost surely, 2^18356072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18356072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20736000).

18356072 is an abundant number, since it is smaller than the sum of its proper divisors (23115928).

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

18356072 is a wasteful number, since it uses less digits than its factorization.

18356072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 18356072 is about 4284.3986742599. The cubic root of 18356072 is about 263.7909655378.

The spelling of 18356072 in words is "eighteen million, three hundred fifty-six thousand, seventy-two".