21234314053 has 2 divisors, whose sum is σ = 21234314054. Its totient is φ = 21234314052.

The previous prime is 21234314039. The next prime is 21234314077. The reversal of 21234314053 is 35041343212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21223245124 + 11068929 = 145682^2 + 3327^2 .

It is a cyclic number.

It is not a de Polignac number, because 21234314053 - 2²⁵ = 21200759621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21234314753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617157026 + 10617157027.

It is an arithmetic number, because the mean of its divisors is an integer number (10617157027).

Almost surely, 2^21234314053 is an apocalyptic number.

It is an amenable number.

21234314053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234314053 is an equidigital number, since it uses as much as digits as its factorization.

21234314053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21234314053 its reverse (35041343212), we get a palindrome (56275657265).

The spelling of 21234314053 in words is "twenty-one billion, two hundred thirty-four million, three hundred fourteen thousand, fifty-three".