18714280 has 128 divisors (see below), whose sum is σ = 50349600. Its totient is φ = 6193152.

The previous prime is 18714257. The next prime is 18714281. The reversal of 18714280 is 8241781.

It can be written as a sum of positive squares in 16 ways, for example, as 1855044 + 16859236 = 1362^2 + 4106^2 .

It is not an unprimeable number, because it can be changed into a prime (18714281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256324 + ... + 256396.

It is a vampire number, since it can be written as 2117 ⋅ 8840 (with its own digits).

Almost surely, 2^18714280 is an apocalyptic number.

18714280 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 18714280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25174800).

18714280 is an abundant number, since it is smaller than the sum of its proper divisors (31635320).

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

18714280 is a wasteful number, since it uses less digits than its factorization.

18714280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18714280 is about 4326.0004623208. Note that the first 3 decimals coincide. The cubic root of 18714280 is about 265.4958321005.

The spelling of 18714280 in words is "eighteen million, seven hundred fourteen thousand, two hundred eighty".