21334000531 has 2 divisors, whose sum is σ = 21334000532. Its totient is φ = 21334000530.

The previous prime is 21334000529. The next prime is 21334000537. The reversal of 21334000531 is 13500043312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21334000531 - 2¹ = 21334000529 is a prime.

It is a super-2 number, since 2×21334000531² (a number of 21 digits) contains 22 as substring.

Together with 21334000529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21334000537) 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, 10667000265 + 10667000266.

It is an arithmetic number, because the mean of its divisors is an integer number (10667000266).

Almost surely, 2^21334000531 is an apocalyptic number.

21334000531 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334000531 is an equidigital number, since it uses as much as digits as its factorization.

21334000531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 21334000531 its reverse (13500043312), we get a palindrome (34834043843).

The spelling of 21334000531 in words is "twenty-one billion, three hundred thirty-four million, five hundred thirty-one", and thus it is an aban number.