18259140 has 48 divisors (see below), whose sum is σ = 51331392. Its totient is φ = 4849536.

The previous prime is 18259123. The next prime is 18259147. The reversal of 18259140 is 4195281.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18259098 and 18259107.

It is not an unprimeable number, because it can be changed into a prime (18259147) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20382 + ... + 21258.

It is an arithmetic number, because the mean of its divisors is an integer number (1069404).

Almost surely, 2^18259140 is an apocalyptic number.

18259140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18259140 is an abundant number, since it is smaller than the sum of its proper divisors (33072252).

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

18259140 is a wasteful number, since it uses less digits than its factorization.

18259140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18259140 is about 4273.0714948383. The cubic root of 18259140 is about 263.3258165171.

The spelling of 18259140 in words is "eighteen million, two hundred fifty-nine thousand, one hundred forty".