18814005 has 64 divisors (see below), whose sum is σ = 39198720. Its totient is φ = 8382528.

The previous prime is 18814001. The next prime is 18814007. The reversal of 18814005 is 50041881.

It is not a de Polignac number, because 18814005 - 2² = 18814001 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18814005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18814001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40404 + ... + 40866.

It is an arithmetic number, because the mean of its divisors is an integer number (612480).

Almost surely, 2^18814005 is an apocalyptic number.

18814005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18814005 is an abundant number, since it is smaller than the sum of its proper divisors (20384715).

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

18814005 is a wasteful number, since it uses less digits than its factorization.

18814005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18814005 is about 4337.5113832704. The cubic root of 18814005 is about 265.9665899207.

Adding to 18814005 its reverse (50041881), we get a palindrome (68855886).

It can be divided in two parts, 1881 and 4005, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 18814005 in words is "eighteen million, eight hundred fourteen thousand, five".