20402220122 has 8 divisors (see below), whose sum is σ = 30621804276. Its totient is φ = 10194952032.

The previous prime is 20402220089. The next prime is 20402220131. The reversal of 20402220122 is 22102220402.

It can be written as a sum of positive squares in 2 ways, for example, as 20300835361 + 101384761 = 142481^2 + 10069^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20402220122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074873 + ... + 3081500.

Almost surely, 2^20402220122 is an apocalyptic number.

20402220122 is a deficient number, since it is larger than the sum of its proper divisors (10219584154).

20402220122 is a wasteful number, since it uses less digits than its factorization.

20402220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6158032.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20402220122 its reverse (22102220402), we get a palindrome (42504440524).

The spelling of 20402220122 in words is "twenty billion, four hundred two million, two hundred twenty thousand, one hundred twenty-two".