18148244 has 6 divisors (see below), whose sum is σ = 31759434. Its totient is φ = 9074120.

The previous prime is 18148217. The next prime is 18148259. The reversal of 18148244 is 44284181.

It can be written as a sum of positive squares in only one way, i.e., 10640644 + 7507600 = 3262^2 + 2740^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18148244.

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, 2268527 + ... + 2268534.

It is an arithmetic number, because the mean of its divisors is an integer number (5293239).

Almost surely, 2^18148244 is an apocalyptic number.

It is an amenable number.

18148244 is a deficient number, since it is larger than the sum of its proper divisors (13611190).

18148244 is a wasteful number, since it uses less digits than its factorization.

18148244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537065 (or 4537063 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 18148244 is about 4260.0755861839. The cubic root of 18148244 is about 262.7916347582.

The spelling of 18148244 in words is "eighteen million, one hundred forty-eight thousand, two hundred forty-four".