21704567041 has 2 divisors, whose sum is σ = 21704567042. Its totient is φ = 21704567040.

The previous prime is 21704567033. The next prime is 21704567083. The reversal of 21704567041 is 14076540712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19636136641 + 2068430400 = 140129^2 + 45480^2 .

It is a cyclic number.

It is not a de Polignac number, because 21704567041 - 2³ = 21704567033 is a prime.

It is not a weakly prime, because it can be changed into another prime (21704565041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10852283520 + 10852283521.

It is an arithmetic number, because the mean of its divisors is an integer number (10852283521).

Almost surely, 2^21704567041 is an apocalyptic number.

It is an amenable number.

21704567041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21704567041 is an equidigital number, since it uses as much as digits as its factorization.

21704567041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 21704567041 in words is "twenty-one billion, seven hundred four million, five hundred sixty-seven thousand, forty-one".