21035324507 has 2 divisors, whose sum is σ = 21035324508. Its totient is φ = 21035324506.

The previous prime is 21035324501. The next prime is 21035324533. The reversal of 21035324507 is 70542353012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21035324507 - 2¹⁴ = 21035308123 is a prime.

It is a super-2 number, since 2×21035324507² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21035324501) 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, 10517662253 + 10517662254.

It is an arithmetic number, because the mean of its divisors is an integer number (10517662254).

Almost surely, 2^21035324507 is an apocalyptic number.

21035324507 is a deficient number, since it is larger than the sum of its proper divisors (1).

21035324507 is an equidigital number, since it uses as much as digits as its factorization.

21035324507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

Adding to 21035324507 its reverse (70542353012), we get a palindrome (91577677519).

The spelling of 21035324507 in words is "twenty-one billion, thirty-five million, three hundred twenty-four thousand, five hundred seven".