18444365 has 8 divisors (see below), whose sum is σ = 22161048. Its totient is φ = 14736960.

The previous prime is 18444359. The next prime is 18444373. The reversal of 18444365 is 56344481.

It can be written as a sum of positive squares in 4 ways, for example, as 5929 + 18438436 = 77^2 + 4294^2 .

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

It is not a de Polignac number, because 18444365 - 2¹² = 18440269 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3299 + ... + 6911.

It is an arithmetic number, because the mean of its divisors is an integer number (2770131).

Almost surely, 2^18444365 is an apocalyptic number.

It is an amenable number.

18444365 is a deficient number, since it is larger than the sum of its proper divisors (3716683).

18444365 is a wasteful number, since it uses less digits than its factorization.

18444365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639.

The product of its digits is 46080, while the sum is 35.

The square root of 18444365 is about 4294.6903264380. The cubic root of 18444365 is about 264.2132354729.

The spelling of 18444365 in words is "eighteen million, four hundred forty-four thousand, three hundred sixty-five".