18293340 has 96 divisors (see below), whose sum is σ = 56448000. Its totient is φ = 4398336.

The previous prime is 18293329. The next prime is 18293369. The reversal of 18293340 is 4339281.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18293298 and 18293307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36411 + ... + 36909.

It is an arithmetic number, because the mean of its divisors is an integer number (588000).

Almost surely, 2^18293340 is an apocalyptic number.

18293340 is a gapful number since it is divisible by the number (10) 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 18293340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224000).

18293340 is an abundant number, since it is smaller than the sum of its proper divisors (38154660).

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

18293340 is a wasteful number, since it uses less digits than its factorization.

18293340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 18293340 is about 4277.0714279750. The cubic root of 18293340 is about 263.4901200947.

The spelling of 18293340 in words is "eighteen million, two hundred ninety-three thousand, three hundred forty".