21945095713 has 2 divisors, whose sum is σ = 21945095714. Its totient is φ = 21945095712.

The previous prime is 21945095693. The next prime is 21945095719. The reversal of 21945095713 is 31759054912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13817532304 + 8127563409 = 117548^2 + 90153^2 .

It is a cyclic number.

It is not a de Polignac number, because 21945095713 - 2⁵ = 21945095681 is a prime.

It is not a weakly prime, because it can be changed into another prime (21945095719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10972547856 + 10972547857.

It is an arithmetic number, because the mean of its divisors is an integer number (10972547857).

Almost surely, 2^21945095713 is an apocalyptic number.

It is an amenable number.

21945095713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21945095713 is an equidigital number, since it uses as much as digits as its factorization.

21945095713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 21945095713 in words is "twenty-one billion, nine hundred forty-five million, ninety-five thousand, seven hundred thirteen".