18884385 has 48 divisors (see below), whose sum is σ = 37128000. Its totient is φ = 8802432.

The previous prime is 18884317. The next prime is 18884387. The reversal of 18884385 is 58348881.

It is not a de Polignac number, because 18884385 - 2⁹ = 18883873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18884385.

It is not an unprimeable number, because it can be changed into a prime (18884387) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10266 + ... + 11964.

It is an arithmetic number, because the mean of its divisors is an integer number (773500).

Almost surely, 2^18884385 is an apocalyptic number.

18884385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18884385 is a deficient number, since it is larger than the sum of its proper divisors (18243615).

18884385 is a wasteful number, since it uses less digits than its factorization.

18884385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 1739 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 18884385 is about 4345.6167571474. The cubic root of 18884385 is about 266.2978225280.

The spelling of 18884385 in words is "eighteen million, eight hundred eighty-four thousand, three hundred eighty-five".