20110021522 has 16 divisors (see below), whose sum is σ = 31555834200. Its totient is φ = 9599201920.

The previous prime is 20110021511. The next prime is 20110021523. The reversal of 20110021522 is 22512001102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18950550921 + 1159470601 = 137661^2 + 34051^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20110021496 and 20110021505.

It is not an unprimeable number, because it can be changed into a prime (20110021523) by changing a digit.

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, 1942729 + ... + 1953052.

Almost surely, 2^20110021522 is an apocalyptic number.

20110021522 is a deficient number, since it is larger than the sum of its proper divisors (11445812678).

20110021522 is a wasteful number, since it uses less digits than its factorization.

20110021522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3895901.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20110021522 its reverse (22512001102), we get a palindrome (42622022624).

The spelling of 20110021522 in words is "twenty billion, one hundred ten million, twenty-one thousand, five hundred twenty-two".