18466445 has 8 divisors (see below), whose sum is σ = 22463736. Its totient is φ = 14570496.

The previous prime is 18466439. The next prime is 18466457. The reversal of 18466445 is 54466481.

It can be written as a sum of positive squares in 4 ways, for example, as 2128681 + 16337764 = 1459^2 + 4042^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18466445 - 2⁴ = 18466429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18466399 and 18466408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24932 + ... + 25661.

It is an arithmetic number, because the mean of its divisors is an integer number (2807967).

Almost surely, 2^18466445 is an apocalyptic number.

It is an amenable number.

18466445 is a deficient number, since it is larger than the sum of its proper divisors (3997291).

18466445 is an equidigital number, since it uses as much as digits as its factorization.

18466445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50671.

The product of its digits is 92160, while the sum is 38.

The square root of 18466445 is about 4297.2601736455. The cubic root of 18466445 is about 264.3186245148.

The spelling of 18466445 in words is "eighteen million, four hundred sixty-six thousand, four hundred forty-five".