21068098128 has 240 divisors, whose sum is σ = 73621871232. Its totient is φ = 5463936000.

The previous prime is 21068098127. The next prime is 21068098157. The reversal of 21068098128 is 82189086012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21068098127) 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, 11319918 + ... + 11321778.

Almost surely, 2^21068098128 is an apocalyptic number.

21068098128 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 21068098128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36810935616).

21068098128 is an abundant number, since it is smaller than the sum of its proper divisors (52553773104).

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

21068098128 is a wasteful number, since it uses less digits than its factorization.

21068098128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914 (or 2905 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 21068098128 in words is "twenty-one billion, sixty-eight million, ninety-eight thousand, one hundred twenty-eight".