18310005 has 48 divisors (see below), whose sum is σ = 37275264. Its totient is φ = 8138880.

The previous prime is 18309983. The next prime is 18310007. The reversal of 18310005 is 50001381.

It is a happy number.

It is not a de Polignac number, because 18310005 - 2⁷ = 18309877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18310005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18310007) 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, 10870 + ... + 12440.

It is an arithmetic number, because the mean of its divisors is an integer number (776568).

Almost surely, 2^18310005 is an apocalyptic number.

18310005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18310005 is an abundant number, since it is smaller than the sum of its proper divisors (18965259).

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

18310005 is a wasteful number, since it uses less digits than its factorization.

18310005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 18310005 is about 4279.0191633130. The cubic root of 18310005 is about 263.5701078594.

Adding to 18310005 its reverse (50001381), we get a palindrome (68311386).

The spelling of 18310005 in words is "eighteen million, three hundred ten thousand, five".