18479958 has 48 divisors (see below), whose sum is σ = 43338240. Its totient is φ = 5237904.

The previous prime is 18479947. The next prime is 18479959. The reversal of 18479958 is 85997481.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18479958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18479959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70135 + ... + 70397.

It is an arithmetic number, because the mean of its divisors is an integer number (902880).

Almost surely, 2^18479958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18479958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21669120).

18479958 is an abundant number, since it is smaller than the sum of its proper divisors (24858282).

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

18479958 is a wasteful number, since it uses less digits than its factorization.

18479958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 514 counting only the distinct ones).

The product of its digits is 725760, while the sum is 51.

The square root of 18479958 is about 4298.8321669961. The cubic root of 18479958 is about 264.3830813663.

It can be divided in two parts, 1847995 and 8, that added together give a triangular number (1848003 = T₁₉₂₂).

The spelling of 18479958 in words is "eighteen million, four hundred seventy-nine thousand, nine hundred fifty-eight".