21319364041 has 2 divisors, whose sum is σ = 21319364042. Its totient is φ = 21319364040.

The previous prime is 21319364039. The next prime is 21319364057. The reversal of 21319364041 is 14046391312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20706058816 + 613305225 = 143896^2 + 24765^2 .

It is a cyclic number.

It is not a de Polignac number, because 21319364041 - 2¹ = 21319364039 is a prime.

It is a super-2 number, since 2×21319364041² (a number of 21 digits) contains 22 as substring.

Together with 21319364039, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21319363988 and 21319364006.

It is not a weakly prime, because it can be changed into another prime (21319364071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10659682020 + 10659682021.

It is an arithmetic number, because the mean of its divisors is an integer number (10659682021).

Almost surely, 2^21319364041 is an apocalyptic number.

It is an amenable number.

21319364041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21319364041 is an equidigital number, since it uses as much as digits as its factorization.

21319364041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 21319364041 in words is "twenty-one billion, three hundred nineteen million, three hundred sixty-four thousand, forty-one".