21461467 has 2 divisors, whose sum is σ = 21461468. Its totient is φ = 21461466.

The previous prime is 21461441. The next prime is 21461521. The reversal of 21461467 is 76416412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21461467 - 2¹¹ = 21459419 is a prime.

It is not a weakly prime, because it can be changed into another prime (21461417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10730733 + 10730734.

It is an arithmetic number, because the mean of its divisors is an integer number (10730734).

Almost surely, 2^21461467 is an apocalyptic number.

21461467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21461467 is an equidigital number, since it uses as much as digits as its factorization.

21461467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 21461467 is about 4632.6522640924. The cubic root of 21461467 is about 277.8986700038.

Adding to 21461467 its reverse (76416412), we get a palindrome (97877879).

The spelling of 21461467 in words is "twenty-one million, four hundred sixty-one thousand, four hundred sixty-seven".