21634100205713 has 2 divisors, whose sum is σ = 21634100205714. Its totient is φ = 21634100205712.

The previous prime is 21634100205703. The next prime is 21634100205721. The reversal of 21634100205713 is 31750200143612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17559644918929 + 4074455286784 = 4190423^2 + 2018528^2 .

It is a cyclic number.

It is not a de Polignac number, because 21634100205713 - 2⁶ = 21634100205649 is a prime.

It is not a weakly prime, because it can be changed into another prime (21634100205703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10817050102856 + 10817050102857.

It is an arithmetic number, because the mean of its divisors is an integer number (10817050102857).

Almost surely, 2^{21634100205713} is an apocalyptic number.

It is an amenable number.

21634100205713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21634100205713 is an equidigital number, since it uses as much as digits as its factorization.

21634100205713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 21634100205713 in words is "twenty-one trillion, six hundred thirty-four billion, one hundred million, two hundred five thousand, seven hundred thirteen".