20102222002 has 4 divisors (see below), whose sum is σ = 30153333006. Its totient is φ = 10051111000.

The previous prime is 20102221991. The next prime is 20102222017. The reversal of 20102222002 is 20022220102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14239410241 + 5862811761 = 119329^2 + 76569^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 5025555499 + ... + 5025555502.

Almost surely, 2^20102222002 is an apocalyptic number.

20102222002 is a deficient number, since it is larger than the sum of its proper divisors (10051111004).

20102222002 is a wasteful number, since it uses less digits than its factorization.

20102222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051111003.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20102222002 its reverse (20022220102), we get a palindrome (40124442104).

The spelling of 20102222002 in words is "twenty billion, one hundred two million, two hundred twenty-two thousand, two".