18134216 has 8 divisors (see below), whose sum is σ = 34001670. Its totient is φ = 9067104.

The previous prime is 18134201. The next prime is 18134243. The reversal of 18134216 is 61243181.

It can be written as a sum of positive squares in only one way, i.e., 9897316 + 8236900 = 3146^2 + 2870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×18134216³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133381 + ... + 1133396.

Almost surely, 2^18134216 is an apocalyptic number.

It is an amenable number.

18134216 is a deficient number, since it is larger than the sum of its proper divisors (15867454).

18134216 is a wasteful number, since it uses less digits than its factorization.

18134216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266783 (or 2266779 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 18134216 is about 4258.4288182380. The cubic root of 18134216 is about 262.7239075207.

Adding to 18134216 its reverse (61243181), we get a palindrome (79377397).

The spelling of 18134216 in words is "eighteen million, one hundred thirty-four thousand, two hundred sixteen".