18021354 has 64 divisors (see below), whose sum is σ = 41610240. Its totient is φ = 5160960.

The previous prime is 18021347. The next prime is 18021371. The reversal of 18021354 is 45312081.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69994 + ... + 70250.

It is an arithmetic number, because the mean of its divisors is an integer number (650160).

Almost surely, 2^18021354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18021354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20805120).

18021354 is an abundant number, since it is smaller than the sum of its proper divisors (23588886).

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

18021354 is a wasteful number, since it uses less digits than its factorization.

18021354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18021354 is about 4245.1565342164. The cubic root of 18021354 is about 262.1777342282.

The spelling of 18021354 in words is "eighteen million, twenty-one thousand, three hundred fifty-four".