21847214041 has 2 divisors, whose sum is σ = 21847214042. Its totient is φ = 21847214040.

The previous prime is 21847213981. The next prime is 21847214069. The reversal of 21847214041 is 14041274812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18852388416 + 2994825625 = 137304^2 + 54725^2 .

It is a cyclic number.

It is not a de Polignac number, because 21847214041 - 2³³ = 13257279449 is a prime.

It is a super-2 number, since 2×21847214041² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21847213988 and 21847214006.

It is not a weakly prime, because it can be changed into another prime (21847214341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10923607020 + 10923607021.

It is an arithmetic number, because the mean of its divisors is an integer number (10923607021).

Almost surely, 2^21847214041 is an apocalyptic number.

It is an amenable number.

21847214041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21847214041 is an equidigital number, since it uses as much as digits as its factorization.

21847214041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 34.

Adding to 21847214041 its reverse (14041274812), we get a palindrome (35888488853).

The spelling of 21847214041 in words is "twenty-one billion, eight hundred forty-seven million, two hundred fourteen thousand, forty-one".