18013302 has 72 divisors (see below), whose sum is σ = 43459416. Its totient is φ = 5370624.

The previous prime is 18013297. The next prime is 18013313. The reversal of 18013302 is 20331081.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 418893 + ... + 418935.

It is an arithmetic number, because the mean of its divisors is an integer number (603603).

Almost surely, 2^18013302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18013302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21729708).

18013302 is an abundant number, since it is smaller than the sum of its proper divisors (25446114).

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

18013302 is a wasteful number, since it uses less digits than its factorization.

18013302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18013302 is about 4244.2080533357. The cubic root of 18013302 is about 262.1386811211.

Adding to 18013302 its reverse (20331081), we get a palindrome (38344383).

The spelling of 18013302 in words is "eighteen million, thirteen thousand, three hundred two".