21030213467 has 2 divisors, whose sum is σ = 21030213468. Its totient is φ = 21030213466.

The previous prime is 21030213401. The next prime is 21030213469. The reversal of 21030213467 is 76431203012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21030213467 is a prime.

Together with 21030213469, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21030213469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515106733 + 10515106734.

It is an arithmetic number, because the mean of its divisors is an integer number (10515106734).

Almost surely, 2^21030213467 is an apocalyptic number.

21030213467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030213467 is an equidigital number, since it uses as much as digits as its factorization.

21030213467 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 21030213467 its reverse (76431203012), we get a palindrome (97461416479).

The spelling of 21030213467 in words is "twenty-one billion, thirty million, two hundred thirteen thousand, four hundred sixty-seven".