18020106 has 48 divisors (see below), whose sum is σ = 42869736. Its totient is φ = 5436288.

The previous prime is 18020089. The next prime is 18020111. The reversal of 18020106 is 60102081.

It can be written as a sum of positive squares in 4 ways, for example, as 17564481 + 455625 = 4191^2 + 675^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11676 + ... + 13128.

Almost surely, 2^18020106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18020106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21434868).

18020106 is an abundant number, since it is smaller than the sum of its proper divisors (24849630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18020106 is a wasteful number, since it uses less digits than its factorization.

18020106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18020106 is about 4245.0095406253. The cubic root of 18020106 is about 262.1716820494.

Adding to 18020106 its reverse (60102081), we get a palindrome (78122187).

The spelling of 18020106 in words is "eighteen million, twenty thousand, one hundred six".