21175385027 has 2 divisors, whose sum is σ = 21175385028. Its totient is φ = 21175385026.

The previous prime is 21175385017. The next prime is 21175385057. The reversal of 21175385027 is 72058357112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21175385027 is a prime.

It is not a weakly prime, because it can be changed into another prime (21175385017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10587692513 + 10587692514.

It is an arithmetic number, because the mean of its divisors is an integer number (10587692514).

Almost surely, 2^21175385027 is an apocalyptic number.

21175385027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21175385027 is an equidigital number, since it uses as much as digits as its factorization.

21175385027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 21175385027 in words is "twenty-one billion, one hundred seventy-five million, three hundred eighty-five thousand, twenty-seven".