18812115 has 64 divisors (see below), whose sum is σ = 40504320. Its totient is φ = 8087040.

The previous prime is 18812093. The next prime is 18812117. The reversal of 18812115 is 51121881.

It is not a de Polignac number, because 18812115 - 2⁶ = 18812051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18812117) 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 63 ways as a sum of consecutive naturals, for example, 15480 + ... + 16650.

It is an arithmetic number, because the mean of its divisors is an integer number (632880).

Almost surely, 2^18812115 is an apocalyptic number.

18812115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18812115 is an abundant number, since it is smaller than the sum of its proper divisors (21692205).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18812115 is a wasteful number, since it uses less digits than its factorization.

18812115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1203 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 18812115 is about 4337.2935109351. The cubic root of 18812115 is about 265.9576835468.

Adding to 18812115 its reverse (51121881), we get a palindrome (69933996).

The spelling of 18812115 in words is "eighteen million, eight hundred twelve thousand, one hundred fifteen".