20102202 has 16 divisors (see below), whose sum is σ = 44671680.
Its totient is φ = 6700716.
The previous prime is 20102153. The next prime is 20102213. The reversal of 20102202 is 20220102.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186078 + ... + 186185.
It is an arithmetic number, because the mean of its divisors is an integer number (2791980).
Almost surely, 220102202 is an apocalyptic number.
20102202 is an abundant number, since it is smaller than the sum of its proper divisors (24569478).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20102202 is a wasteful number, since it uses less digits than its factorization.
20102202 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 372274 (or 372268 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 9.
The square root of 20102202 is about 4483.5479254715.
The cubic root of 20102202 is about 271.9033411597.
Adding to 20102202 its reverse (20220102), we get a palindrome (40322304).
It can be divided in two parts, 20102 and 202, that multiplied together give a palindrome (4060604).
The spelling of 20102202 in words is "twenty million, one hundred two thousand, two hundred two".