20106207 has 36 divisors (see below), whose sum is σ = 32851000. Its totient is φ = 11832480.

The previous prime is 20106187. The next prime is 20106217. The reversal of 20106207 is 70260102.

It is a happy number.

It is not a de Polignac number, because 20106207 - 2⁶ = 20106143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20106207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106217) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 40044 + ... + 40542.

Almost surely, 2^20106207 is an apocalyptic number.

20106207 is a deficient number, since it is larger than the sum of its proper divisors (12744793).

20106207 is a wasteful number, since it uses less digits than its factorization.

20106207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20106207 is about 4483.9945361251. The cubic root of 20106207 is about 271.9213972342.

Adding to 20106207 its reverse (70260102), we get a palindrome (90366309).

The spelling of 20106207 in words is "twenty million, one hundred six thousand, two hundred seven".