20944728088 has 32 divisors (see below), whose sum is σ = 39648087360. Its totient is φ = 10372042240.

The previous prime is 20944728061. The next prime is 20944728089. The reversal of 20944728088 is 88082744902.

It is a happy number.

It is a super-2 number, since 2×20944728088² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20944728089) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1336458 + ... + 1352038.

It is an arithmetic number, because the mean of its divisors is an integer number (1239002730).

Almost surely, 2^20944728088 is an apocalyptic number.

It is an amenable number.

20944728088 is a deficient number, since it is larger than the sum of its proper divisors (18703359272).

20944728088 is a wasteful number, since it uses less digits than its factorization.

20944728088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17187 (or 17183 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 20944728088 in words is "twenty billion, nine hundred forty-four million, seven hundred twenty-eight thousand, eighty-eight".