20199642848 has 96 divisors (see below), whose sum is σ = 50734252800. Its totient is φ = 7686927360.

The previous prime is 20199642847. The next prime is 20199642871. The reversal of 20199642848 is 84824699102.

It is a happy number.

It is a super-2 number, since 2×20199642848² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20199642848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20199642847) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10628 + ... + 201276.

It is an arithmetic number, because the mean of its divisors is an integer number (528481800).

Almost surely, 2^20199642848 is an apocalyptic number.

20199642848 is a gapful number since it is divisible by the number (28) 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 20199642848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25367126400).

20199642848 is an abundant number, since it is smaller than the sum of its proper divisors (30534609952).

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

20199642848 is a wasteful number, since it uses less digits than its factorization.

20199642848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190720 (or 190712 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 20199642848 in words is "twenty billion, one hundred ninety-nine million, six hundred forty-two thousand, eight hundred forty-eight".