20023205522 has 4 divisors (see below), whose sum is σ = 30034808286. Its totient is φ = 10011602760.

The previous prime is 20023205491. The next prime is 20023205533. The reversal of 20023205522 is 22550232002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22550232002 = 2 ⋅11275116001.

It can be written as a sum of positive squares in only one way, i.e., 19443792481 + 579413041 = 139441^2 + 24071^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005801379 + ... + 5005801382.

Almost surely, 2^20023205522 is an apocalyptic number.

20023205522 is a deficient number, since it is larger than the sum of its proper divisors (10011602764).

20023205522 is a wasteful number, since it uses less digits than its factorization.

20023205522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011602763.

The product of its (nonzero) digits is 2400, while the sum is 23.

Adding to 20023205522 its reverse (22550232002), we get a palindrome (42573437524).

The spelling of 20023205522 in words is "twenty billion, twenty-three million, two hundred five thousand, five hundred twenty-two".