20984219522 has 18 divisors (see below), whose sum is σ = 36617824233. Its totient is φ = 8992622352.

The previous prime is 20984219521. The next prime is 20984219549. The reversal of 20984219522 is 22591248902.

It can be written as a sum of positive squares in 2 ways, for example, as 11716114081 + 9268105441 = 108241^2 + 96271^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=102431.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20984219521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1426718 + ... + 1441350.

Almost surely, 2^20984219522 is an apocalyptic number.

20984219522 is a deficient number, since it is larger than the sum of its proper divisors (15633604711).

20984219522 is an frugal number, since it uses more digits than its factorization.

20984219522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29282 (or 14642 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 20984219522 in words is "twenty billion, nine hundred eighty-four million, two hundred nineteen thousand, five hundred twenty-two".