18115210 has 16 divisors (see below), whose sum is σ = 33302016. Its totient is φ = 7091728.

The previous prime is 18115193. The next prime is 18115211. The reversal of 18115210 is 1251181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18115211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18802 + ... + 19741.

It is an arithmetic number, because the mean of its divisors is an integer number (2081376).

Almost surely, 2^18115210 is an apocalyptic number.

18115210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18115210 is a deficient number, since it is larger than the sum of its proper divisors (15186806).

18115210 is a wasteful number, since it uses less digits than its factorization.

18115210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38597.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 18115210 is about 4256.1966589903. The cubic root of 18115210 is about 262.6320907389.

Adding to 18115210 its reverse (1251181), we get a palindrome (19366391).

It can be divided in two parts, 1811 and 5210, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 18115210 in words is "eighteen million, one hundred fifteen thousand, two hundred ten".