21620470341347 has 2 divisors, whose sum is σ = 21620470341348. Its totient is φ = 21620470341346.

The previous prime is 21620470341341. The next prime is 21620470341439. The reversal of 21620470341347 is 74314307402612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21620470341347 - 2¹⁴ = 21620470324963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21620470341298 and 21620470341307.

It is not a weakly prime, because it can be changed into another prime (21620470341341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10810235170673 + 10810235170674.

It is an arithmetic number, because the mean of its divisors is an integer number (10810235170674).

Almost surely, 2^{21620470341347} is an apocalyptic number.

21620470341347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21620470341347 is an equidigital number, since it uses as much as digits as its factorization.

21620470341347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 44.

Adding to 21620470341347 its reverse (74314307402612), we get a palindrome (95934777743959).

The spelling of 21620470341347 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy million, three hundred forty-one thousand, three hundred forty-seven".