21857345448696 has 96 divisors (see below), whose sum is σ = 60615180912000. Its totient is φ = 7111466010432.

The previous prime is 21857345448647. The next prime is 21857345448703. The reversal of 21857345448696 is 69684454375812.

21857345448696 is a `hidden beast` number, since 2 + 1 + 8 + 5 + 7 + 3 + 4 + 54 + 486 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2097645 + ... + 6936483.

It is an arithmetic number, because the mean of its divisors is an integer number (631408134500).

Almost surely, 2^{21857345448696} 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 21857345448696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30307590456000).

21857345448696 is an abundant number, since it is smaller than the sum of its proper divisors (38757835463304).

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

21857345448696 is a wasteful number, since it uses less digits than its factorization.

21857345448696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840353 (or 4840346 counting only the distinct ones).

The product of its digits is 1393459200, while the sum is 72.

The spelling of 21857345448696 in words is "twenty-one trillion, eight hundred fifty-seven billion, three hundred forty-five million, four hundred forty-eight thousand, six hundred ninety-six".