18479538 has 96 divisors (see below), whose sum is σ = 50918400. Its totient is φ = 4704480.

The previous prime is 18479537. The next prime is 18479569. The reversal of 18479538 is 83597481.

It is a junction number, because it is equal to n+sod(n) for n = 18479493 and 18479502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18479537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92763 + ... + 92961.

It is an arithmetic number, because the mean of its divisors is an integer number (530400).

Almost surely, 2^18479538 is an apocalyptic number.

18479538 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 18479538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25459200).

18479538 is an abundant number, since it is smaller than the sum of its proper divisors (32438862).

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

18479538 is a wasteful number, since it uses less digits than its factorization.

18479538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 289 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 18479538 is about 4298.7833162419. The cubic root of 18479538 is about 264.3810784445.

The spelling of 18479538 in words is "eighteen million, four hundred seventy-nine thousand, five hundred thirty-eight".