18582940 has 24 divisors (see below), whose sum is σ = 39134592. Its totient is φ = 7412160.

The previous prime is 18582937. The next prime is 18582947. The reversal of 18582940 is 4928581.

It is a self number, because there is not a number n which added to its sum of digits gives 18582940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18582947) 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 7 ways as a sum of consecutive naturals, for example, 7317 + ... + 9523.

It is an arithmetic number, because the mean of its divisors is an integer number (1630608).

Almost surely, 2^18582940 is an apocalyptic number.

18582940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18582940 is an abundant number, since it is smaller than the sum of its proper divisors (20551652).

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

18582940 is a wasteful number, since it uses less digits than its factorization.

18582940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637 (or 2635 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18582940 is about 4310.7934304487. The cubic root of 18582940 is about 264.8732751156.

The spelling of 18582940 in words is "eighteen million, five hundred eighty-two thousand, nine hundred forty".