21030413267 has 2 divisors, whose sum is σ = 21030413268. Its totient is φ = 21030413266.

The previous prime is 21030413231. The next prime is 21030413273. The reversal of 21030413267 is 76231403012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21030413267 - 2⁶ = 21030413203 is a prime.

It is a super-2 number, since 2×21030413267² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21030413867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515206633 + 10515206634.

It is an arithmetic number, because the mean of its divisors is an integer number (10515206634).

Almost surely, 2^21030413267 is an apocalyptic number.

21030413267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030413267 is an equidigital number, since it uses as much as digits as its factorization.

21030413267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

Adding to 21030413267 its reverse (76231403012), we get a palindrome (97261816279).

The spelling of 21030413267 in words is "twenty-one billion, thirty million, four hundred thirteen thousand, two hundred sixty-seven".