20298989568 has 432 divisors, whose sum is σ = 67116996576. Its totient is φ = 5379194880.

The previous prime is 20298989567. The next prime is 20298989569. The reversal of 20298989568 is 86598989202.

It is an interprime number because it is at equal distance from previous prime (20298989567) and next prime (20298989569).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 20298989499 and 20298989508.

It is not an unprimeable number, because it can be changed into a prime (20298989561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1068367863 + ... + 1068367881.

It is an arithmetic number, because the mean of its divisors is an integer number (155363418).

Almost surely, 2^20298989568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20298989568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33558498288).

20298989568 is an abundant number, since it is smaller than the sum of its proper divisors (46818007008).

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

20298989568 is an equidigital number, since it uses as much as digits as its factorization.

20298989568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 66.

The spelling of 20298989568 in words is "twenty billion, two hundred ninety-eight million, nine hundred eighty-nine thousand, five hundred sixty-eight".