21857300559668 has 192 divisors, whose sum is σ = 45531434876928. Its totient is φ = 8986488675840.

The previous prime is 21857300559629. The next prime is 21857300559707. The reversal of 21857300559668 is 86695500375812.

It is an interprime number because it is at equal distance from previous prime (21857300559629) and next prime (21857300559707).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11833946321 + ... + 11833948167.

It is an arithmetic number, because the mean of its divisors is an integer number (237142889984).

Almost surely, 2^{21857300559668} is an apocalyptic number.

21857300559668 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 21857300559668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22765717438464).

21857300559668 is an abundant number, since it is smaller than the sum of its proper divisors (23674134317260).

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

21857300559668 is a wasteful number, since it uses less digits than its factorization.

21857300559668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582 (or 2580 counting only the distinct ones).

The product of its (nonzero) digits is 108864000, while the sum is 65.

The spelling of 21857300559668 in words is "twenty-one trillion, eight hundred fifty-seven billion, three hundred million, five hundred fifty-nine thousand, six hundred sixty-eight".