20022021988 has 12 divisors (see below), whose sum is σ = 35073134460. Its totient is φ = 10001126432.

The previous prime is 20022021923. The next prime is 20022021997. The reversal of 20022021988 is 88912022002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1299025764 + 18722996224 = 36042^2 + 136832^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 2466583 + ... + 2474686.

It is an arithmetic number, because the mean of its divisors is an integer number (2922761205).

Almost surely, 2^20022021988 is an apocalyptic number.

It is an amenable number.

20022021988 is a deficient number, since it is larger than the sum of its proper divisors (15051112472).

20022021988 is a wasteful number, since it uses less digits than its factorization.

20022021988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942286 (or 4942284 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 20022021988 in words is "twenty billion, twenty-two million, twenty-one thousand, nine hundred eighty-eight".