18021127 has 8 divisors (see below), whose sum is σ = 18372240. Its totient is φ = 17673600.

The previous prime is 18021083. The next prime is 18021131. The reversal of 18021127 is 72112081.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18021127 is a prime.

It is a super-2 number, since 2×18021127² = 649522036700258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18021098 and 18021107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18021187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10624 + ... + 12202.

It is an arithmetic number, because the mean of its divisors is an integer number (2296530).

Almost surely, 2^18021127 is an apocalyptic number.

18021127 is a deficient number, since it is larger than the sum of its proper divisors (351113).

18021127 is a wasteful number, since it uses less digits than its factorization.

18021127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 18021127 is about 4245.1297977800. The cubic root of 18021127 is about 262.1766334120.

The spelling of 18021127 in words is "eighteen million, twenty-one thousand, one hundred twenty-seven".