18140058 has 32 divisors (see below), whose sum is σ = 40979520. Its totient is φ = 5946480.

The previous prime is 18140047. The next prime is 18140063. The reversal of 18140058 is 85004181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541 + ... + 6047.

It is an arithmetic number, because the mean of its divisors is an integer number (1280610).

Almost surely, 2^18140058 is an apocalyptic number.

18140058 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18140058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20489760).

18140058 is an abundant number, since it is smaller than the sum of its proper divisors (22839462).

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

18140058 is a wasteful number, since it uses less digits than its factorization.

18140058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5579 (or 5573 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18140058 is about 4259.1146967416. The cubic root of 18140058 is about 262.7521169615.

The spelling of 18140058 in words is "eighteen million, one hundred forty thousand, fifty-eight".