18313552 has 20 divisors (see below), whose sum is σ = 36349236. Its totient is φ = 8933120.

The previous prime is 18313531. The next prime is 18313553. The reversal of 18313552 is 25531381.

It can be written as a sum of positive squares in 2 ways, for example, as 9096256 + 9217296 = 3016^2 + 3036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18313552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18313553) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13303 + ... + 14614.

Almost surely, 2^18313552 is an apocalyptic number.

It is an amenable number.

18313552 is a deficient number, since it is larger than the sum of its proper divisors (18035684).

18313552 is a wasteful number, since it uses less digits than its factorization.

18313552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27966 (or 27960 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 18313552 is about 4279.4336073831. The cubic root of 18313552 is about 263.5871262929.

The spelling of 18313552 in words is "eighteen million, three hundred thirteen thousand, five hundred fifty-two".