18206101 has 4 divisors (see below), whose sum is σ = 18223852. Its totient is φ = 18188352.

The previous prime is 18206077. The next prime is 18206117. The reversal of 18206101 is 10160281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18054001 + 152100 = 4249^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 18206101 - 2⁷ = 18205973 is a prime.

It is a super-2 number, since 2×18206101² = 662924227244402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18206131) 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 3 ways as a sum of consecutive naturals, for example, 7236 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (4555963).

Almost surely, 2^18206101 is an apocalyptic number.

It is an amenable number.

18206101 is a deficient number, since it is larger than the sum of its proper divisors (17751).

18206101 is a wasteful number, since it uses less digits than its factorization.

18206101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17750.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 18206101 is about 4266.8607898548. The cubic root of 18206101 is about 263.0706003506.

Adding to 18206101 its reverse (10160281), we get a palindrome (28366382).

It can be divided in two parts, 1820 and 6101, that added together give a square (7921 = 89²).

The spelling of 18206101 in words is "eighteen million, two hundred six thousand, one hundred one".