21230182726553 has 2 divisors, whose sum is σ = 21230182726554. Its totient is φ = 21230182726552.

The previous prime is 21230182726549. The next prime is 21230182726609. The reversal of 21230182726553 is 35562728103212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13970191979584 + 7259990746969 = 3737672^2 + 2694437^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230182726553 - 2² = 21230182726549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230182726498 and 21230182726507.

It is not a weakly prime, because it can be changed into another prime (21230182720553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615091363276 + 10615091363277.

It is an arithmetic number, because the mean of its divisors is an integer number (10615091363277).

Almost surely, 2^{21230182726553} is an apocalyptic number.

It is an amenable number.

21230182726553 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230182726553 is an equidigital number, since it uses as much as digits as its factorization.

21230182726553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 21230182726553 in words is "twenty-one trillion, two hundred thirty billion, one hundred eighty-two million, seven hundred twenty-six thousand, five hundred fifty-three".