18284454 has 40 divisors (see below), whose sum is σ = 41686920. Its totient is φ = 5988384.

The previous prime is 18284449. The next prime is 18284467. The reversal of 18284454 is 45448281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8602 + ... + 10514.

It is an arithmetic number, because the mean of its divisors is an integer number (1042173).

Almost surely, 2^18284454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18284454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20843460).

18284454 is an abundant number, since it is smaller than the sum of its proper divisors (23402466).

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

18284454 is a wasteful number, since it uses less digits than its factorization.

18284454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1977 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 18284454 is about 4276.0325068923. The cubic root of 18284454 is about 263.4474496945.

The spelling of 18284454 in words is "eighteen million, two hundred eighty-four thousand, four hundred fifty-four".