18671140 has 24 divisors (see below), whose sum is σ = 39876480. Its totient is φ = 7341408.

The previous prime is 18671131. The next prime is 18671141. The reversal of 18671140 is 4117681.

It is a super-2 number, since 2×18671140² = 697222937799200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18671099 and 18671108.

It is not an unprimeable number, because it can be changed into a prime (18671141) 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, 6732 + ... + 9091.

It is an arithmetic number, because the mean of its divisors is an integer number (1661520).

Almost surely, 2^18671140 is an apocalyptic number.

18671140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18671140 is an abundant number, since it is smaller than the sum of its proper divisors (21205340).

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

18671140 is a wasteful number, since it uses less digits than its factorization.

18671140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15891 (or 15889 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 18671140 is about 4321.0114556664. The cubic root of 18671140 is about 265.2916688926.

The spelling of 18671140 in words is "eighteen million, six hundred seventy-one thousand, one hundred forty".