18135130 has 16 divisors (see below), whose sum is σ = 35154504. Its totient is φ = 6696000.

The previous prime is 18135119. The next prime is 18135137. The reversal of 18135130 is 3153181.

It can be written as a sum of positive squares in 4 ways, for example, as 15342889 + 2792241 = 3917^2 + 1671^2 .

It is not an unprimeable number, because it can be changed into a prime (18135137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69621 + ... + 69880.

Almost surely, 2^18135130 is an apocalyptic number.

18135130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18135130 is a deficient number, since it is larger than the sum of its proper divisors (17019374).

18135130 is a wasteful number, since it uses less digits than its factorization.

18135130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139521.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 18135130 is about 4258.5361334618. The cubic root of 18135130 is about 262.7283213797.

The spelling of 18135130 in words is "eighteen million, one hundred thirty-five thousand, one hundred thirty".