21080467 has 2 divisors, whose sum is σ = 21080468. Its totient is φ = 21080466.

The previous prime is 21080447. The next prime is 21080473. The reversal of 21080467 is 76408012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21080467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21080447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10540233 + 10540234.

It is an arithmetic number, because the mean of its divisors is an integer number (10540234).

Almost surely, 2^21080467 is an apocalyptic number.

21080467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21080467 is an equidigital number, since it uses as much as digits as its factorization.

21080467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 21080467 is about 4591.3469701167. The cubic root of 21080467 is about 276.2443531943.

Adding to 21080467 its reverse (76408012), we get a palindrome (97488479).

The spelling of 21080467 in words is "twenty-one million, eighty thousand, four hundred sixty-seven".