18444308 has 6 divisors (see below), whose sum is σ = 32277546. Its totient is φ = 9222152.

The previous prime is 18444289. The next prime is 18444323. The reversal of 18444308 is 80344481.

It can be written as a sum of positive squares in only one way, i.e., 18215824 + 228484 = 4268^2 + 478^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2305535 + ... + 2305542.

It is an arithmetic number, because the mean of its divisors is an integer number (5379591).

Almost surely, 2^18444308 is an apocalyptic number.

It is an amenable number.

18444308 is a deficient number, since it is larger than the sum of its proper divisors (13833238).

18444308 is a wasteful number, since it uses less digits than its factorization.

18444308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611081 (or 4611079 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 18444308 is about 4294.6836903316. The cubic root of 18444308 is about 264.2129633000.

Adding to 18444308 its reverse (80344481), we get a palindrome (98788789).

The spelling of 18444308 in words is "eighteen million, four hundred forty-four thousand, three hundred eight".