18010140 has 48 divisors (see below), whose sum is σ = 53397792. Its totient is φ = 4519936.

The previous prime is 18010121. The next prime is 18010147. The reversal of 18010140 is 4101081.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18010147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7809 + ... + 9848.

It is an arithmetic number, because the mean of its divisors is an integer number (1112454).

Almost surely, 2^18010140 is an apocalyptic number.

18010140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18010140 is an abundant number, since it is smaller than the sum of its proper divisors (35387652).

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

18010140 is a wasteful number, since it uses less digits than its factorization.

18010140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17686 (or 17684 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 18010140 is about 4243.8355293296. The cubic root of 18010140 is about 262.1233418824.

The spelling of 18010140 in words is "eighteen million, ten thousand, one hundred forty".