18682720 has 72 divisors (see below), whose sum is σ = 51365664. Its totient is φ = 6402816.

The previous prime is 18682691. The next prime is 18682721. The reversal of 18682720 is 2728681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18682721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6649 + ... + 9031.

It is an arithmetic number, because the mean of its divisors is an integer number (713412).

Almost surely, 2^18682720 is an apocalyptic number.

18682720 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 18682720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25682832).

18682720 is an abundant number, since it is smaller than the sum of its proper divisors (32682944).

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

18682720 is a wasteful number, since it uses less digits than its factorization.

18682720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 18682720 is about 4322.3512120141. The cubic root of 18682720 is about 265.3465029419.

The spelling of 18682720 in words is "eighteen million, six hundred eighty-two thousand, seven hundred twenty".