18675140 has 36 divisors (see below), whose sum is σ = 43112748. Its totient is φ = 6790080.

The previous prime is 18675091. The next prime is 18675143. The reversal of 18675140 is 4157681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7929856 + 10745284 = 2816^2 + 3278^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18675097 and 18675106.

It is not an unprimeable number, because it can be changed into a prime (18675143) 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 11 ways as a sum of consecutive naturals, for example, 1439 + ... + 6278.

Almost surely, 2^18675140 is an apocalyptic number.

18675140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18675140 is an abundant number, since it is smaller than the sum of its proper divisors (24437608).

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

18675140 is a wasteful number, since it uses less digits than its factorization.

18675140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7748 (or 7735 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 18675140 is about 4321.4742854725. The cubic root of 18675140 is about 265.3106124048.

It can be divided in two parts, 1867 and 5140, that added together give a palindrome (7007).

The spelling of 18675140 in words is "eighteen million, six hundred seventy-five thousand, one hundred forty".