21868253334853 has 8 divisors (see below), whose sum is σ = 21898673596800. Its totient is φ = 21837851310240.

The previous prime is 21868253334847. The next prime is 21868253334871. The reversal of 21868253334853 is 35843335286812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21868253334853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21868253334791 and 21868253334800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21868253334883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2158603 + ... + 6956728.

It is an arithmetic number, because the mean of its divisors is an integer number (2737334199600).

Almost surely, 2^{21868253334853} is an apocalyptic number.

It is an amenable number.

21868253334853 is a deficient number, since it is larger than the sum of its proper divisors (30420261947).

21868253334853 is a wasteful number, since it uses less digits than its factorization.

21868253334853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9118667.

The product of its digits is 99532800, while the sum is 61.

The spelling of 21868253334853 in words is "twenty-one trillion, eight hundred sixty-eight billion, two hundred fifty-three million, three hundred thirty-four thousand, eight hundred fifty-three".