21424668231053 has 2 divisors, whose sum is σ = 21424668231054. Its totient is φ = 21424668231052.

The previous prime is 21424668231047. The next prime is 21424668231073. The reversal of 21424668231053 is 35013286642412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12097617854569 + 9327050376484 = 3478163^2 + 3054022^2 .

It is a cyclic number.

It is not a de Polignac number, because 21424668231053 - 2¹⁴ = 21424668214669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21424668230989 and 21424668231007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21424668231013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10712334115526 + 10712334115527.

It is an arithmetic number, because the mean of its divisors is an integer number (10712334115527).

Almost surely, 2^{21424668231053} is an apocalyptic number.

It is an amenable number.

21424668231053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21424668231053 is an equidigital number, since it uses as much as digits as its factorization.

21424668231053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 21424668231053 in words is "twenty-one trillion, four hundred twenty-four billion, six hundred sixty-eight million, two hundred thirty-one thousand, fifty-three".