21358067 has 2 divisors, whose sum is σ = 21358068. Its totient is φ = 21358066.

The previous prime is 21358063. The next prime is 21358079. The reversal of 21358067 is 76085312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21358067 - 2² = 21358063 is a prime.

It is not a weakly prime, because it can be changed into another prime (21358063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10679033 + 10679034.

It is an arithmetic number, because the mean of its divisors is an integer number (10679034).

Almost surely, 2^21358067 is an apocalyptic number.

21358067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21358067 is an equidigital number, since it uses as much as digits as its factorization.

21358067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 21358067 is about 4621.4788758578. The cubic root of 21358067 is about 277.4516518859.

The spelling of 21358067 in words is "twenty-one million, three hundred fifty-eight thousand, sixty-seven".