20758238648 has 64 divisors (see below), whose sum is σ = 45548194560. Its totient is φ = 8683428096.

The previous prime is 20758238639. The next prime is 20758238653. The reversal of 20758238648 is 84683285702.

It is a self number, because there is not a number n which added to its sum of digits gives 20758238648.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5649740 + ... + 5653412.

It is an arithmetic number, because the mean of its divisors is an integer number (711690540).

Almost surely, 2^20758238648 is an apocalyptic number.

20758238648 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 20758238648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22774097280).

20758238648 is an abundant number, since it is smaller than the sum of its proper divisors (24789955912).

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

20758238648 is a wasteful number, since it uses less digits than its factorization.

20758238648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6076 (or 6072 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 20758238648 in words is "twenty billion, seven hundred fifty-eight million, two hundred thirty-eight thousand, six hundred forty-eight".