21320430041 has 2 divisors, whose sum is σ = 21320430042. Its totient is φ = 21320430040.

The previous prime is 21320430023. The next prime is 21320430073. The reversal of 21320430041 is 14003402312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16049089225 + 5271340816 = 126685^2 + 72604^2 .

It is a cyclic number.

It is not a de Polignac number, because 21320430041 - 2¹⁴ = 21320413657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320429995 and 21320430022.

It is not a weakly prime, because it can be changed into another prime (21320435041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660215020 + 10660215021.

It is an arithmetic number, because the mean of its divisors is an integer number (10660215021).

Almost surely, 2^21320430041 is an apocalyptic number.

It is an amenable number.

21320430041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320430041 is an equidigital number, since it uses as much as digits as its factorization.

21320430041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21320430041 its reverse (14003402312), we get a palindrome (35323832353).

The spelling of 21320430041 in words is "twenty-one billion, three hundred twenty million, four hundred thirty thousand, forty-one".