21634100205717 has 8 divisors (see below), whose sum is σ = 28848117491424. Its totient is φ = 14421408195248.

The previous prime is 21634100205713. The next prime is 21634100205721. The reversal of 21634100205717 is 71750200143612.

It is an interprime number because it is at equal distance from previous prime (21634100205713) and next prime (21634100205721).

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 21634100205717 - 2² = 21634100205713 is a prime.

It is a super-2 number, since 2×21634100205717² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21634100205713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331280718 + ... + 331346015.

It is an arithmetic number, because the mean of its divisors is an integer number (3606014686428).

Almost surely, 2^{21634100205717} is an apocalyptic number.

It is an amenable number.

21634100205717 is a deficient number, since it is larger than the sum of its proper divisors (7214017285707).

21634100205717 is a wasteful number, since it uses less digits than its factorization.

21634100205717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662637619.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 21634100205717 in words is "twenty-one trillion, six hundred thirty-four billion, one hundred million, two hundred five thousand, seven hundred seventeen".