18013810 has 16 divisors (see below), whose sum is σ = 32674752. Its totient is φ = 7150000.

The previous prime is 18013781. The next prime is 18013813. The reversal of 18013810 is 1831081.

It is a super-2 number, since 2×18013810² = 648994701432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18013813) 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 7 ways as a sum of consecutive naturals, for example, 5566 + ... + 8185.

It is an arithmetic number, because the mean of its divisors is an integer number (2042172).

Almost surely, 2^18013810 is an apocalyptic number.

18013810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18013810 is a deficient number, since it is larger than the sum of its proper divisors (14660942).

18013810 is a wasteful number, since it uses less digits than its factorization.

18013810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13889.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 18013810 is about 4244.2678991788. The cubic root of 18013810 is about 262.1411453222.

Adding to 18013810 its reverse (1831081), we get a palindrome (19844891).

The spelling of 18013810 in words is "eighteen million, thirteen thousand, eight hundred ten".