18440966 has 4 divisors (see below), whose sum is σ = 27661452. Its totient is φ = 9220482.

The previous prime is 18440959. The next prime is 18440969. The reversal of 18440966 is 66904481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66904481 = 7 ⋅9557783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4610240 + ... + 4610243.

It is an arithmetic number, because the mean of its divisors is an integer number (6915363).

Almost surely, 2^18440966 is an apocalyptic number.

18440966 is a deficient number, since it is larger than the sum of its proper divisors (9220486).

18440966 is an equidigital number, since it uses as much as digits as its factorization.

18440966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220485.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 18440966 is about 4294.2945870073. The cubic root of 18440966 is about 264.1970043917.

The spelling of 18440966 in words is "eighteen million, four hundred forty thousand, nine hundred sixty-six".