18327101 has 16 divisors (see below), whose sum is σ = 20608560. Its totient is φ = 16181760.

The previous prime is 18327097. The next prime is 18327103. The reversal of 18327101 is 10172381.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 391876 + 17935225 = 626^2 + 4235^2 .

It is a cyclic number.

It is not a de Polignac number, because 18327101 - 2² = 18327097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18327103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65081 + ... + 65361.

It is an arithmetic number, because the mean of its divisors is an integer number (1288035).

Almost surely, 2^18327101 is an apocalyptic number.

It is an amenable number.

18327101 is a deficient number, since it is larger than the sum of its proper divisors (2281459).

18327101 is a wasteful number, since it uses less digits than its factorization.

18327101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 18327101 is about 4281.0163512886. The cubic root of 18327101 is about 263.6521138971.

Adding to 18327101 its reverse (10172381), we get a palindrome (28499482).

The spelling of 18327101 in words is "eighteen million, three hundred twenty-seven thousand, one hundred one".