18574530 has 64 divisors (see below), whose sum is σ = 48601728. Its totient is φ = 4515840.

The previous prime is 18574519. The next prime is 18574531. The reversal of 18574530 is 3547581.

It is a junction number, because it is equal to n+sod(n) for n = 18574491 and 18574500.

It is not an unprimeable number, because it can be changed into a prime (18574531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37585 + ... + 38075.

It is an arithmetic number, because the mean of its divisors is an integer number (759402).

Almost surely, 2^18574530 is an apocalyptic number.

18574530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18574530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24300864).

18574530 is an abundant number, since it is smaller than the sum of its proper divisors (30027198).

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

18574530 is a wasteful number, since it uses less digits than its factorization.

18574530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 18574530 is about 4309.8178615807. The cubic root of 18574530 is about 264.8333115725.

The spelling of 18574530 in words is "eighteen million, five hundred seventy-four thousand, five hundred thirty".