18343572 has 48 divisors (see below), whose sum is σ = 46898880. Its totient is φ = 5545728.

The previous prime is 18343571. The next prime is 18343609. The reversal of 18343572 is 27534381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8208 + ... + 10200.

It is an arithmetic number, because the mean of its divisors is an integer number (977060).

Almost surely, 2^18343572 is an apocalyptic number.

18343572 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 18343572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23449440).

18343572 is an abundant number, since it is smaller than the sum of its proper divisors (28555308).

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

18343572 is a wasteful number, since it uses less digits than its factorization.

18343572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072 (or 2070 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 18343572 is about 4282.9396446833. The cubic root of 18343572 is about 263.7310737151.

It can be divided in two parts, 18343 and 572, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 18343572 in words is "eighteen million, three hundred forty-three thousand, five hundred seventy-two".