18666354 has 48 divisors (see below), whose sum is σ = 43797888. Its totient is φ = 5287968.

The previous prime is 18666353. The next prime is 18666383. The reversal of 18666354 is 45366681.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18666353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50679 + ... + 51045.

It is an arithmetic number, because the mean of its divisors is an integer number (912456).

Almost surely, 2^18666354 is an apocalyptic number.

18666354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18666354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21898944).

18666354 is an abundant number, since it is smaller than the sum of its proper divisors (25131534).

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

18666354 is a wasteful number, since it uses less digits than its factorization.

18666354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 552 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 18666354 is about 4320.4576146515. The cubic root of 18666354 is about 265.2689994246.

The spelling of 18666354 in words is "eighteen million, six hundred sixty-six thousand, three hundred fifty-four".