18866045 has 8 divisors (see below), whose sum is σ = 24697440. Its totient is φ = 13720720.

The previous prime is 18866033. The next prime is 18866051. The reversal of 18866045 is 54066881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18866045 - 2¹² = 18861949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171455 + ... + 171564.

It is an arithmetic number, because the mean of its divisors is an integer number (3087180).

Almost surely, 2^18866045 is an apocalyptic number.

It is an amenable number.

18866045 is a deficient number, since it is larger than the sum of its proper divisors (5831395).

18866045 is a wasteful number, since it uses less digits than its factorization.

18866045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343035.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18866045 is about 4343.5060722877. The cubic root of 18866045 is about 266.2115875433.

The spelling of 18866045 in words is "eighteen million, eight hundred sixty-six thousand, forty-five".