18954666 has 36 divisors (see below), whose sum is σ = 43358562. Its totient is φ = 5983632.

The previous prime is 18954613. The next prime is 18954679. The reversal of 18954666 is 66645981.

It can be written as a sum of positive squares in only one way, i.e., 9828225 + 9126441 = 3135^2 + 3021^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5040 + ... + 7956.

Almost surely, 2^18954666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18954666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21679281).

18954666 is an abundant number, since it is smaller than the sum of its proper divisors (24403896).

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

18954666 is a wasteful number, since it uses less digits than its factorization.

18954666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963 (or 2941 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 18954666 is about 4353.6956714957. The cubic root of 18954666 is about 266.6277689792.

It can be divided in two parts, 1895 and 4666, that added together give a 8-th power (6561 = 3⁸).

The spelling of 18954666 in words is "eighteen million, nine hundred fifty-four thousand, six hundred sixty-six".