20889206 has 16 divisors (see below), whose sum is σ = 34299888. Its totient is φ = 9482400.

The previous prime is 20889199. The next prime is 20889223. The reversal of 20889206 is 60298802.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5000 + ... + 8171.

It is an arithmetic number, because the mean of its divisors is an integer number (2143743).

Almost surely, 2^20889206 is an apocalyptic number.

20889206 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20889206 is a deficient number, since it is larger than the sum of its proper divisors (13410682).

20889206 is a wasteful number, since it uses less digits than its factorization.

20889206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13247.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20889206 is about 4570.4710916928. The cubic root of 20889206 is about 275.4063678091.

The spelling of 20889206 in words is "twenty million, eight hundred eighty-nine thousand, two hundred six".