20505102202 has 16 divisors (see below), whose sum is σ = 33181660512. Its totient is φ = 9447312240.

The previous prime is 20505102193. The next prime is 20505102227. The reversal of 20505102202 is 20220150502.

It is a self number, because there is not a number n which added to its sum of digits gives 20505102202.

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, 675748 + ... + 705439.

It is an arithmetic number, because the mean of its divisors is an integer number (2073853782).

Almost surely, 2^20505102202 is an apocalyptic number.

20505102202 is a deficient number, since it is larger than the sum of its proper divisors (12676558310).

20505102202 is a wasteful number, since it uses less digits than its factorization.

20505102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381773.

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 20505102202 its reverse (20220150502), we get a palindrome (40725252704).

The spelling of 20505102202 in words is "twenty billion, five hundred five million, one hundred two thousand, two hundred two".