18263532 has 48 divisors (see below), whose sum is σ = 49900032. Its totient is φ = 5089920.

The previous prime is 18263521. The next prime is 18263551. The reversal of 18263532 is 23536281.

It is a super-2 number, since 2×18263532² = 667113202230048, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18263532.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 793 + ... + 6095.

It is an arithmetic number, because the mean of its divisors is an integer number (1039584).

Almost surely, 2^18263532 is an apocalyptic number.

18263532 is a gapful number since it is divisible by the number (12) 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 18263532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24950016).

18263532 is an abundant number, since it is smaller than the sum of its proper divisors (31636500).

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

18263532 is a wasteful number, since it uses less digits than its factorization.

18263532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5358 (or 5356 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 18263532 is about 4273.5853799825. The cubic root of 18263532 is about 263.3469280311.

The spelling of 18263532 in words is "eighteen million, two hundred sixty-three thousand, five hundred thirty-two".