18001782 has 12 divisors (see below), whose sum is σ = 39003900. Its totient is φ = 6000588.

The previous prime is 18001729. The next prime is 18001811. The reversal of 18001782 is 28710081.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

18001782 is a modest number, since divided by 1782 gives 18 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500032 + ... + 500067.

It is an arithmetic number, because the mean of its divisors is an integer number (3250325).

Almost surely, 2^18001782 is an apocalyptic number.

18001782 is an abundant number, since it is smaller than the sum of its proper divisors (21002118).

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

18001782 is a wasteful number, since it uses less digits than its factorization.

18001782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000107 (or 1000104 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 18001782 is about 4242.8506926358. The cubic root of 18001782 is about 262.0827875821.

The spelling of 18001782 in words is "eighteen million, one thousand, seven hundred eighty-two".