18018106 has 16 divisors (see below), whose sum is σ = 28644840. Its totient is φ = 8485120.

The previous prime is 18018073. The next prime is 18018107. The reversal of 18018106 is 60181081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5022081 + 12996025 = 2241^2 + 3605^2 .

It is not an unprimeable number, because it can be changed into a prime (18018107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411 + ... + 6166.

Almost surely, 2^18018106 is an apocalyptic number.

18018106 is a deficient number, since it is larger than the sum of its proper divisors (10626734).

18018106 is a wasteful number, since it uses less digits than its factorization.

18018106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 18018106 is about 4244.7739633578. The cubic root of 18018106 is about 262.1619824623.

Adding to 18018106 its reverse (60181081), we get a palindrome (78199187).

It can be divided in two parts, 1801 and 8106, that multiplied together give a triangular number (14598906 = T₅₄₀₃).

The spelling of 18018106 in words is "eighteen million, eighteen thousand, one hundred six".