18586040 has 64 divisors (see below), whose sum is σ = 46539360. Its totient is φ = 6622720.

The previous prime is 18586039. The next prime is 18586063. The reversal of 18586040 is 4068581.

It is a junction number, because it is equal to n+sod(n) for n = 18585988 and 18586006.

It is a congruent number.

It is an unprimeable number.

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, 22922 + ... + 23718.

Almost surely, 2^18586040 is an apocalyptic number.

18586040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18586040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23269680).

18586040 is an abundant number, since it is smaller than the sum of its proper divisors (27953320).

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

18586040 is a wasteful number, since it uses less digits than its factorization.

18586040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 18586040 is about 4311.1529780327. The cubic root of 18586040 is about 264.8880029878. Note that the first 3 decimals are identical.

The spelling of 18586040 in words is "eighteen million, five hundred eighty-six thousand, forty".