18189460 has 48 divisors (see below), whose sum is σ = 40602240. Its totient is φ = 6825600.

The previous prime is 18189449. The next prime is 18189469. The reversal of 18189460 is 6498181.

It is a happy number.

18189460 is nontrivially palindromic in base 14.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18189469) 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, 57222 + ... + 57538.

It is an arithmetic number, because the mean of its divisors is an integer number (845880).

Almost surely, 2^18189460 is an apocalyptic number.

18189460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18189460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20301120).

18189460 is an abundant number, since it is smaller than the sum of its proper divisors (22412780).

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

18189460 is a wasteful number, since it uses less digits than its factorization.

18189460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18189460 is about 4264.9103155870. The cubic root of 18189460 is about 262.9904240708.

The spelling of 18189460 in words is "eighteen million, one hundred eighty-nine thousand, four hundred sixty".