20113206 has 16 divisors (see below), whose sum is σ = 41208048. Its totient is φ = 6540800.

The previous prime is 20113189. The next prime is 20113213. The reversal of 20113206 is 60231102.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40635 + ... + 41126.

It is an arithmetic number, because the mean of its divisors is an integer number (2575503).

Almost surely, 2^20113206 is an apocalyptic number.

20113206 is an abundant number, since it is smaller than the sum of its proper divisors (21094842).

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

20113206 is a wasteful number, since it uses less digits than its factorization.

20113206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81807.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20113206 is about 4484.7749107397. The cubic root of 20113206 is about 271.9529456522.

Adding to 20113206 its reverse (60231102), we get a palindrome (80344308).

The spelling of 20113206 in words is "twenty million, one hundred thirteen thousand, two hundred six".