20930206 has 8 divisors (see below), whose sum is σ = 34249464. Its totient is φ = 9513720.

The previous prime is 20930201. The next prime is 20930209. The reversal of 20930206 is 60203902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 951373 = 20930206 / (2 + 0 + 9 + 3 + 0 + 2 + 0 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20930201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475665 + ... + 475708.

It is an arithmetic number, because the mean of its divisors is an integer number (4281183).

Almost surely, 2^20930206 is an apocalyptic number.

20930206 is a deficient number, since it is larger than the sum of its proper divisors (13319258).

20930206 is a wasteful number, since it uses less digits than its factorization.

20930206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951386.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20930206 is about 4574.9542074211. The cubic root of 20930206 is about 275.5864333991.

The spelling of 20930206 in words is "twenty million, nine hundred thirty thousand, two hundred six".