20705106 has 32 divisors (see below), whose sum is σ = 43960320. Its totient is φ = 6487184.

The previous prime is 20705081. The next prime is 20705107. The reversal of 20705106 is 60150702.

It is not an unprimeable number, because it can be changed into a prime (20705107) 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, 6871 + ... + 9413.

It is an arithmetic number, because the mean of its divisors is an integer number (1373760).

Almost surely, 2^20705106 is an apocalyptic number.

20705106 is an abundant number, since it is smaller than the sum of its proper divisors (23255214).

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

20705106 is a wasteful number, since it uses less digits than its factorization.

20705106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20705106 is about 4550.2863646149. The cubic root of 20705106 is about 274.5949121195.

Adding to 20705106 its reverse (60150702), we get a palindrome (80855808).

The spelling of 20705106 in words is "twenty million, seven hundred five thousand, one hundred six".