21410205004457 has 2 divisors, whose sum is σ = 21410205004458. Its totient is φ = 21410205004456.

The previous prime is 21410205004451. The next prime is 21410205004543. The reversal of 21410205004457 is 75440050201412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20623260368656 + 786944635801 = 4541284^2 + 887099^2 .

It is a cyclic number.

It is not a de Polignac number, because 21410205004457 - 2⁶ = 21410205004393 is a prime.

It is not a weakly prime, because it can be changed into another prime (21410205004451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705102502228 + 10705102502229.

It is an arithmetic number, because the mean of its divisors is an integer number (10705102502229).

Almost surely, 2^{21410205004457} is an apocalyptic number.

It is an amenable number.

21410205004457 is a deficient number, since it is larger than the sum of its proper divisors (1).

21410205004457 is an equidigital number, since it uses as much as digits as its factorization.

21410205004457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 35.

Adding to 21410205004457 its reverse (75440050201412), we get a palindrome (96850255205869).

The spelling of 21410205004457 in words is "twenty-one trillion, four hundred ten billion, two hundred five million, four thousand, four hundred fifty-seven".