20106606 has 48 divisors (see below), whose sum is σ = 44271360. Its totient is φ = 6084000.

The previous prime is 20106601. The next prime is 20106607. The reversal of 20106606 is 60660102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79981 + ... + 80231.

It is an arithmetic number, because the mean of its divisors is an integer number (922320).

Almost surely, 2^20106606 is an apocalyptic number.

20106606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20106606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22135680).

20106606 is an abundant number, since it is smaller than the sum of its proper divisors (24164754).

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

20106606 is a wasteful number, since it uses less digits than its factorization.

20106606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20106606 is about 4484.0390274840. The cubic root of 20106606 is about 271.9231959477.

Adding to 20106606 its reverse (60660102), we get a palindrome (80766708).

The spelling of 20106606 in words is "twenty million, one hundred six thousand, six hundred six".