20449638792 has 96 divisors (see below), whose sum is σ = 60443379360. Its totient is φ = 6194400000.

The previous prime is 20449638779. The next prime is 20449638829. The reversal of 20449638792 is 29783694402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3522292 + ... + 3528092.

It is an arithmetic number, because the mean of its divisors is an integer number (629618535).

Almost surely, 2^20449638792 is an apocalyptic number.

20449638792 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20449638792 is an abundant number, since it is smaller than the sum of its proper divisors (39993740568).

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

20449638792 is a wasteful number, since it uses less digits than its factorization.

20449638792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10275 (or 10268 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 20449638792 in words is "twenty billion, four hundred forty-nine million, six hundred thirty-eight thousand, seven hundred ninety-two".