21341344853 has 2 divisors, whose sum is σ = 21341344854. Its totient is φ = 21341344852.

The previous prime is 21341344813. The next prime is 21341344891. The reversal of 21341344853 is 35844314312.

It is an a-pointer prime, because the next prime (21341344891) can be obtained adding 21341344853 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14187906769 + 7153438084 = 119113^2 + 84578^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341344853 - 2¹⁴ = 21341328469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21341344813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670672426 + 10670672427.

It is an arithmetic number, because the mean of its divisors is an integer number (10670672427).

Almost surely, 2^21341344853 is an apocalyptic number.

It is an amenable number.

21341344853 is a deficient number, since it is larger than the sum of its proper divisors (1).

21341344853 is an equidigital number, since it uses as much as digits as its factorization.

21341344853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 38.

The spelling of 21341344853 in words is "twenty-one billion, three hundred forty-one million, three hundred forty-four thousand, eight hundred fifty-three".