21234067 has 2 divisors, whose sum is σ = 21234068. Its totient is φ = 21234066.

The previous prime is 21234049. The next prime is 21234091. The reversal of 21234067 is 76043212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21234067 - 2⁷ = 21233939 is a prime.

It is not a weakly prime, because it can be changed into another prime (21234007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617033 + 10617034.

It is an arithmetic number, because the mean of its divisors is an integer number (10617034).

Almost surely, 2^21234067 is an apocalyptic number.

21234067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234067 is an equidigital number, since it uses as much as digits as its factorization.

21234067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21234067 is about 4608.0437280911. The cubic root of 21234067 is about 276.9136693524.

Adding to 21234067 its reverse (76043212), we get a palindrome (97277279).

The spelling of 21234067 in words is "twenty-one million, two hundred thirty-four thousand, sixty-seven".