21594134415001 has 2 divisors, whose sum is σ = 21594134415002. Its totient is φ = 21594134415000.

The previous prime is 21594134414927. The next prime is 21594134415013. The reversal of 21594134415001 is 10051443149512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16051401216400 + 5542733198601 = 4006420^2 + 2354301^2 .

It is a cyclic number.

It is not a de Polignac number, because 21594134415001 - 2²³ = 21594126026393 is a prime.

It is a super-2 number, since 2×21594134415001² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21594134418001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10797067207500 + 10797067207501.

It is an arithmetic number, because the mean of its divisors is an integer number (10797067207501).

Almost surely, 2^{21594134415001} is an apocalyptic number.

It is an amenable number.

21594134415001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21594134415001 is an equidigital number, since it uses as much as digits as its factorization.

21594134415001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 21594134415001 in words is "twenty-one trillion, five hundred ninety-four billion, one hundred thirty-four million, four hundred fifteen thousand, one".