20022202 has 4 divisors (see below), whose sum is σ = 30033306.
Its totient is φ = 10011100.
The previous prime is 20022199. The next prime is 20022203. The reversal of 20022202 is 20222002.
Adding to 20022202 its reverse (20222002), we get a palindrome (40244204).
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20222002 = 2 ⋅10111001.
It can be written as a sum of positive squares in only one way, i.e., 19280881 + 741321 = 4391^2 + 861^2
It is not an unprimeable number, because it can be changed into a prime (20022203) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005549 + ... + 5005552.
Almost surely, 220022202 is an apocalyptic number.
20022202 is a deficient number, since it is larger than the sum of its proper divisors (10011104).
20022202 is a wasteful number, since it uses less digits than its factorization.
20022202 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10011103.
The product of its (nonzero) digits is 32, while the sum is 10.
The square root of 20022202 is about 4474.6175255546.
The cubic root of 20022202 is about 271.5421670152.
The spelling of 20022202 in words is "twenty million, twenty-two thousand, two hundred two".