18270016 has 14 divisors (see below), whose sum is σ = 36254690. Its totient is φ = 9134976.

The previous prime is 18270013. The next prime is 18270023. The reversal of 18270016 is 61007281.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 2903616 = 3920^2 + 1704^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18270013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142671 + ... + 142798.

Almost surely, 2^18270016 is an apocalyptic number.

18270016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18270016 is a deficient number, since it is larger than the sum of its proper divisors (17984674).

18270016 is an equidigital number, since it uses as much as digits as its factorization.

18270016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285481 (or 285471 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 18270016 is about 4274.3439262652. The cubic root of 18270016 is about 263.3780892079.

Adding to 18270016 its reverse (61007281), we get a palindrome (79277297).

The spelling of 18270016 in words is "eighteen million, two hundred seventy thousand, sixteen".