21707293061 has 2 divisors, whose sum is σ = 21707293062. Its totient is φ = 21707293060.

The previous prime is 21707293057. The next prime is 21707293087. The reversal of 21707293061 is 16039270712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12565064836 + 9142228225 = 112094^2 + 95615^2 .

It is a cyclic number.

It is not a de Polignac number, because 21707293061 - 2² = 21707293057 is a prime.

It is a super-2 number, since 2×21707293061² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21707293001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10853646530 + 10853646531.

It is an arithmetic number, because the mean of its divisors is an integer number (10853646531).

Almost surely, 2^21707293061 is an apocalyptic number.

It is an amenable number.

21707293061 is a deficient number, since it is larger than the sum of its proper divisors (1).

21707293061 is an equidigital number, since it uses as much as digits as its factorization.

21707293061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 21707293061 in words is "twenty-one billion, seven hundred seven million, two hundred ninety-three thousand, sixty-one".