18136080 has 60 divisors (see below), whose sum is σ = 60909420. Its totient is φ = 4836096.

The previous prime is 18136073. The next prime is 18136087. The reversal of 18136080 is 8063181.

It is an interprime number because it is at equal distance from previous prime (18136073) and next prime (18136087).

It can be written as a sum of positive squares in 2 ways, for example, as 13046544 + 5089536 = 3612^2 + 2256^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (18136087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11875 + ... + 13314.

It is an arithmetic number, because the mean of its divisors is an integer number (1015157).

Almost surely, 2^18136080 is an apocalyptic number.

18136080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18136080 is an abundant number, since it is smaller than the sum of its proper divisors (42773340).

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

18136080 is a wasteful number, since it uses less digits than its factorization.

18136080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25208 (or 25199 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18136080 is about 4258.6476726773. The cubic root of 18136080 is about 262.7329089315.

The spelling of 18136080 in words is "eighteen million, one hundred thirty-six thousand, eighty".