20820206 has 32 divisors (see below), whose sum is σ = 36391680. Its totient is φ = 8828800.

The previous prime is 20820203. The next prime is 20820211. The reversal of 20820206 is 60202802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20820203) 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, 66791 + ... + 67101.

It is an arithmetic number, because the mean of its divisors is an integer number (1137240).

Almost surely, 2^20820206 is an apocalyptic number.

20820206 is a deficient number, since it is larger than the sum of its proper divisors (15571474).

20820206 is a wasteful number, since it uses less digits than its factorization.

20820206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20820206 is about 4562.9163919581. The cubic root of 20820206 is about 275.1027979319.

The spelling of 20820206 in words is "twenty million, eight hundred twenty thousand, two hundred six".