18128445 has 16 divisors (see below), whose sum is σ = 29356992. Its totient is φ = 9551360.

The previous prime is 18128441. The next prime is 18128449. The reversal of 18128445 is 54482181.

It is an interprime number because it is at equal distance from previous prime (18128441) and next prime (18128449).

It is not a de Polignac number, because 18128445 - 2² = 18128441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18128441) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6036 + ... + 8525.

It is an arithmetic number, because the mean of its divisors is an integer number (1834812).

Almost surely, 2^18128445 is an apocalyptic number.

18128445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18128445 is a deficient number, since it is larger than the sum of its proper divisors (11228547).

18128445 is a wasteful number, since it uses less digits than its factorization.

18128445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14652.

The product of its digits is 10240, while the sum is 33.

The square root of 18128445 is about 4257.7511669894. The cubic root of 18128445 is about 262.6960349706.

The spelling of 18128445 in words is "eighteen million, one hundred twenty-eight thousand, four hundred forty-five".