20010106 has 4 divisors (see below), whose sum is σ = 30015162. Its totient is φ = 10005052.

The previous prime is 20010079. The next prime is 20010127. The reversal of 20010106 is 60101002.

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., 10144225 + 9865881 = 3185^2 + 3141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20010092 and 20010101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002525 + ... + 5002528.

Almost surely, 2^20010106 is an apocalyptic number.

20010106 is a deficient number, since it is larger than the sum of its proper divisors (10005056).

20010106 is a wasteful number, since it uses less digits than its factorization.

20010106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005055.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20010106 is about 4473.2656974519. The cubic root of 20010106 is about 271.4874738016.

Adding to 20010106 its reverse (60101002), we get a palindrome (80111108).

The spelling of 20010106 in words is "twenty million, ten thousand, one hundred six".