20088722440 has 64 divisors (see below), whose sum is σ = 46422558000. Its totient is φ = 7819100160.

The previous prime is 20088722431. The next prime is 20088722461. The reversal of 20088722440 is 4422788002.

It can be written as a sum of positive squares in 8 ways, for example, as 2248846084 + 17839876356 = 47422^2 + 133566^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20088722440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622216 + ... + 653704.

Almost surely, 2^20088722440 is an apocalyptic number.

20088722440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20088722440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23211279000).

20088722440 is an abundant number, since it is smaller than the sum of its proper divisors (26333835560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20088722440 is a wasteful number, since it uses less digits than its factorization.

20088722440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31930 (or 31926 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The spelling of 20088722440 in words is "twenty billion, eighty-eight million, seven hundred twenty-two thousand, four hundred forty".