18282730 has 8 divisors (see below), whose sum is σ = 32908932. Its totient is φ = 7313088.

The previous prime is 18282683. The next prime is 18282739. The reversal of 18282730 is 3728281.

It can be written as a sum of positive squares in 2 ways, for example, as 18173169 + 109561 = 4263^2 + 331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×18282730³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18282692 and 18282701.

It is not an unprimeable number, because it can be changed into a prime (18282739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914127 + ... + 914146.

Almost surely, 2^18282730 is an apocalyptic number.

18282730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18282730 is a deficient number, since it is larger than the sum of its proper divisors (14626202).

18282730 is a wasteful number, since it uses less digits than its factorization.

18282730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828280.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18282730 is about 4275.8309134015. The cubic root of 18282730 is about 263.4391694786.

The spelling of 18282730 in words is "eighteen million, two hundred eighty-two thousand, seven hundred thirty".