21043627080 has 256 divisors, whose sum is σ = 78398668800. Its totient is φ = 4409717760.

The previous prime is 21043627079. The next prime is 21043627127. The reversal of 21043627080 is 8072634012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 473494 + ... + 516026.

It is an arithmetic number, because the mean of its divisors is an integer number (306244800).

Almost surely, 2^21043627080 is an apocalyptic number.

21043627080 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 21043627080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39199334400).

21043627080 is an abundant number, since it is smaller than the sum of its proper divisors (57355041720).

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

21043627080 is a wasteful number, since it uses less digits than its factorization.

21043627080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42604 (or 42600 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 21043627080 in words is "twenty-one billion, forty-three million, six hundred twenty-seven thousand, eighty".