20798906520 has 192 divisors, whose sum is σ = 72703180800. Its totient is φ = 4746228480.

The previous prime is 20798906507. The next prime is 20798906521. The reversal of 20798906520 is 2560989702.

It is a self number, because there is not a number n which added to its sum of digits gives 20798906520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20798906521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4060521 + ... + 4065639.

It is an arithmetic number, because the mean of its divisors is an integer number (378662400).

Almost surely, 2^20798906520 is an apocalyptic number.

20798906520 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 20798906520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36351590400).

20798906520 is an abundant number, since it is smaller than the sum of its proper divisors (51904274280).

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

20798906520 is a wasteful number, since it uses less digits than its factorization.

20798906520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838 (or 5827 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 20798906520 in words is "twenty billion, seven hundred ninety-eight million, nine hundred six thousand, five hundred twenty".