21088862247060 has 144 divisors (see below), whose sum is σ = 66764840478336. Its totient is φ = 5378059289856.

The previous prime is 21088862247029. The next prime is 21088862247161. The reversal of 21088862247060 is 6074226888012.

21088862247060 is a `hidden beast` number, since 2 + 1 + 0 + 8 + 8 + 8 + 622 + 4 + 7 + 0 + 6 + 0 = 666.

It is a super-2 number, since 2×21088862247060² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21088862246988 and 21088862247006.

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 47 ways as a sum of consecutive naturals, for example, 19286122 + ... + 20350238.

It is an arithmetic number, because the mean of its divisors is an integer number (463644725544).

Almost surely, 2^{21088862247060} is an apocalyptic number.

21088862247060 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 21088862247060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33382420239168).

21088862247060 is an abundant number, since it is smaller than the sum of its proper divisors (45675978231276).

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

21088862247060 is a wasteful number, since it uses less digits than its factorization.

21088862247060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068942 (or 1068937 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 21088862247060 in words is "twenty-one trillion, eighty-eight billion, eight hundred sixty-two million, two hundred forty-seven thousand, sixty".