18308135 has 16 divisors (see below), whose sum is σ = 23466240. Its totient is φ = 13681920.

The previous prime is 18308123. The next prime is 18308137. The reversal of 18308135 is 53180381.

It is not a de Polignac number, because 18308135 - 2²² = 14113831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 18308098 and 18308107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18308137) 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 15 ways as a sum of consecutive naturals, for example, 2459 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (1466640).

Almost surely, 2^18308135 is an apocalyptic number.

18308135 is a deficient number, since it is larger than the sum of its proper divisors (5158105).

18308135 is a wasteful number, since it uses less digits than its factorization.

18308135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18308135 is about 4278.8006497148. The cubic root of 18308135 is about 263.5611347528.

The spelling of 18308135 in words is "eighteen million, three hundred eight thousand, one hundred thirty-five".