21704115241 has 2 divisors, whose sum is σ = 21704115242. Its totient is φ = 21704115240.

The previous prime is 21704115221. The next prime is 21704115269. The reversal of 21704115241 is 14251140712.

It is an a-pointer prime, because the next prime (21704115269) can be obtained adding 21704115241 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21485696400 + 218418841 = 146580^2 + 14779^2 .

It is a cyclic number.

It is not a de Polignac number, because 21704115241 - 2³¹ = 19556631593 is a prime.

It is not a weakly prime, because it can be changed into another prime (21704115211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10852057620 + 10852057621.

It is an arithmetic number, because the mean of its divisors is an integer number (10852057621).

Almost surely, 2^21704115241 is an apocalyptic number.

It is an amenable number.

21704115241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21704115241 is an equidigital number, since it uses as much as digits as its factorization.

21704115241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 21704115241 its reverse (14251140712), we get a palindrome (35955255953).

The spelling of 21704115241 in words is "twenty-one billion, seven hundred four million, one hundred fifteen thousand, two hundred forty-one".