21467443 has 2 divisors, whose sum is σ = 21467444. Its totient is φ = 21467442.

The previous prime is 21467431. The next prime is 21467461. The reversal of 21467443 is 34476412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21467443 is a prime.

It is a super-2 number, since 2×21467443² = 921702217916498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21467483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733721 + 10733722.

It is an arithmetic number, because the mean of its divisors is an integer number (10733722).

Almost surely, 2^21467443 is an apocalyptic number.

21467443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467443 is an equidigital number, since it uses as much as digits as its factorization.

21467443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

The square root of 21467443 is about 4633.2972060942. The cubic root of 21467443 is about 277.9244614736.

The spelling of 21467443 in words is "twenty-one million, four hundred sixty-seven thousand, four hundred forty-three".