21354661010363 has 8 divisors (see below), whose sum is σ = 22507840494000. Its totient is φ = 20229268984288.

The previous prime is 21354661010351. The next prime is 21354661010369. The reversal of 21354661010363 is 36301016645312.

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

It is a cyclic number.

It is not a de Polignac number, because 21354661010363 - 2⁶ = 21354661010299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21354661010363.

It is not an unprimeable number, because it can be changed into a prime (21354661010369) 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, 6946862813 + ... + 6946865886.

It is an arithmetic number, because the mean of its divisors is an integer number (2813480061750).

Almost surely, 2^{21354661010363} is an apocalyptic number.

21354661010363 is a deficient number, since it is larger than the sum of its proper divisors (1153179483637).

21354661010363 is a wasteful number, since it uses less digits than its factorization.

21354661010363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13893728781.

The product of its (nonzero) digits is 233280, while the sum is 41.

Adding to 21354661010363 its reverse (36301016645312), we get a palindrome (57655677655675).

The spelling of 21354661010363 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred sixty-one million, ten thousand, three hundred sixty-three".