20102210 has 8 divisors (see below), whose sum is σ = 36183996. Its totient is φ = 8040880.

The previous prime is 20102153. The next prime is 20102213. The reversal of 20102210 is 1220102.

It can be written as a sum of positive squares in 2 ways, for example, as 19088161 + 1014049 = 4369^2 + 1007^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20102213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005101 + ... + 1005120.

Almost surely, 2^20102210 is an apocalyptic number.

20102210 is a deficient number, since it is larger than the sum of its proper divisors (16081786).

20102210 is a wasteful number, since it uses less digits than its factorization.

20102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010228.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20102210 is about 4483.5488176220. The cubic root of 20102210 is about 271.9033772291.

Adding to 20102210 its reverse (1220102), we get a palindrome (21322312).

The spelling of 20102210 in words is "twenty million, one hundred two thousand, two hundred ten".