21302423269 has 2 divisors, whose sum is σ = 21302423270. Its totient is φ = 21302423268.

The previous prime is 21302423231. The next prime is 21302423333. The reversal of 21302423269 is 96232420312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13164579169 + 8137844100 = 114737^2 + 90210^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302423269 - 2¹⁷ = 21302292197 is a prime.

It is a super-2 number, since 2×21302423269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302423069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651211634 + 10651211635.

It is an arithmetic number, because the mean of its divisors is an integer number (10651211635).

Almost surely, 2^21302423269 is an apocalyptic number.

It is an amenable number.

21302423269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302423269 is an equidigital number, since it uses as much as digits as its factorization.

21302423269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 21302423269 in words is "twenty-one billion, three hundred two million, four hundred twenty-three thousand, two hundred sixty-nine".