18120548 has 12 divisors (see below), whose sum is σ = 31746540. Its totient is φ = 9050112.

The previous prime is 18120517. The next prime is 18120559. The reversal of 18120548 is 84502181.

It can be written as a sum of positive squares in 2 ways, for example, as 8248384 + 9872164 = 2872^2 + 3142^2 .

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 18120548.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (2645545).

Almost surely, 2^18120548 is an apocalyptic number.

It is an amenable number.

18120548 is a deficient number, since it is larger than the sum of its proper divisors (13625992).

18120548 is a wasteful number, since it uses less digits than its factorization.

18120548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086 (or 5084 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18120548 is about 4256.8236984869. The cubic root of 18120548 is about 262.6578847617.

The spelling of 18120548 in words is "eighteen million, one hundred twenty thousand, five hundred forty-eight".