20634106 has 4 divisors (see below), whose sum is σ = 30951162. Its totient is φ = 10317052.

The previous prime is 20634101. The next prime is 20634143. The reversal of 20634106 is 60143602.

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

It can be written as a sum of positive squares in only one way, i.e., 14508481 + 6125625 = 3809^2 + 2475^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20634101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5158525 + ... + 5158528.

Almost surely, 2^20634106 is an apocalyptic number.

20634106 is a deficient number, since it is larger than the sum of its proper divisors (10317056).

20634106 is a wasteful number, since it uses less digits than its factorization.

20634106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317055.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20634106 is about 4542.4779581193. The cubic root of 20634106 is about 274.2806809954.

Adding to 20634106 its reverse (60143602), we get a palindrome (80777708).

The spelling of 20634106 in words is "twenty million, six hundred thirty-four thousand, one hundred six".