18270532 has 54 divisors (see below), whose sum is σ = 38828286. Its totient is φ = 7499520.

The previous prime is 18270523. The next prime is 18270559. The reversal of 18270532 is 23507281.

It can be written as a sum of positive squares in only one way, i.e., 15256836 + 3013696 = 3906^2 + 1736^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 18270532.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 188308 + ... + 188404.

Almost surely, 2^18270532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18270532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19414143).

18270532 is an abundant number, since it is smaller than the sum of its proper divisors (20557754).

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

18270532 is a wasteful number, since it uses less digits than its factorization.

18270532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 18270532 is about 4274.4042859795. The cubic root of 18270532 is about 263.3805687134.

The spelling of 18270532 in words is "eighteen million, two hundred seventy thousand, five hundred thirty-two".