18713280 has 112 divisors (see below), whose sum is σ = 60313824. Its totient is φ = 4915200.

The previous prime is 18713269. The next prime is 18713281. The reversal of 18713280 is 8231781.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (18713281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96864 + ... + 97056.

Almost surely, 2^18713280 is an apocalyptic number.

18713280 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 18713280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30156912).

18713280 is an abundant number, since it is smaller than the sum of its proper divisors (41600544).

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

18713280 is a wasteful number, since it uses less digits than its factorization.

18713280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 18713280 is about 4325.8848805765. The cubic root of 18713280 is about 265.4911030814.

It can be divided in two parts, 1871 and 3280, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 18713280 in words is "eighteen million, seven hundred thirteen thousand, two hundred eighty".