18984450 has 48 divisors (see below), whose sum is σ = 47809440. Its totient is φ = 4984320.

The previous prime is 18984443. The next prime is 18984451. The reversal of 18984450 is 5448981.

18984450 is nontrivially palindromic in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 18984399 and 18984408.

It is not an unprimeable number, because it can be changed into a prime (18984451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9106 + ... + 10994.

It is an arithmetic number, because the mean of its divisors is an integer number (996030).

Almost surely, 2^18984450 is an apocalyptic number.

18984450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18984450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23904720).

18984450 is an abundant number, since it is smaller than the sum of its proper divisors (28824990).

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

18984450 is a wasteful number, since it uses less digits than its factorization.

18984450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971 (or 1966 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 18984450 is about 4357.1148711045. The cubic root of 18984450 is about 266.7673491344.

The spelling of 18984450 in words is "eighteen million, nine hundred eighty-four thousand, four hundred fifty".