21934067 has 2 divisors, whose sum is σ = 21934068. Its totient is φ = 21934066.

The previous prime is 21934051. The next prime is 21934079. The reversal of 21934067 is 76043912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21934067 - 2⁴ = 21934051 is a prime.

It is a super-2 number, since 2×21934067² = 962206590320978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21934567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10967033 + 10967034.

It is an arithmetic number, because the mean of its divisors is an integer number (10967034).

Almost surely, 2^21934067 is an apocalyptic number.

21934067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21934067 is an equidigital number, since it uses as much as digits as its factorization.

21934067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 21934067 is about 4683.3820044921. The cubic root of 21934067 is about 279.9237334801.

Adding to 21934067 its reverse (76043912), we get a palindrome (97977979).

The spelling of 21934067 in words is "twenty-one million, nine hundred thirty-four thousand, sixty-seven".