21847214341 has 2 divisors, whose sum is σ = 21847214342. Its totient is φ = 21847214340.

The previous prime is 21847214339. The next prime is 21847214377. The reversal of 21847214341 is 14341274812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15944365441 + 5902848900 = 126271^2 + 76830^2 .

It is a cyclic number.

It is not a de Polignac number, because 21847214341 - 2¹ = 21847214339 is a prime.

Together with 21847214339, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21847214341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21847214041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10923607170 + 10923607171.

It is an arithmetic number, because the mean of its divisors is an integer number (10923607171).

Almost surely, 2^21847214341 is an apocalyptic number.

It is an amenable number.

21847214341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21847214341 is an equidigital number, since it uses as much as digits as its factorization.

21847214341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 37.

The spelling of 21847214341 in words is "twenty-one billion, eight hundred forty-seven million, two hundred fourteen thousand, three hundred forty-one".