18010840 has 32 divisors (see below), whose sum is σ = 42288480. Its totient is φ = 6890752.

The previous prime is 18010829. The next prime is 18010877. The reversal of 18010840 is 4801081.

It is a congruent number.

It is an unprimeable number.

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, 8869 + ... + 10708.

It is an arithmetic number, because the mean of its divisors is an integer number (1321515).

Almost surely, 2^18010840 is an apocalyptic number.

18010840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18010840 is an abundant number, since it is smaller than the sum of its proper divisors (24277640).

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

18010840 is a wasteful number, since it uses less digits than its factorization.

18010840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19611 (or 19607 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 18010840 is about 4243.9180010929. The cubic root of 18010840 is about 262.1267378205.

The spelling of 18010840 in words is "eighteen million, ten thousand, eight hundred forty".