21736067 has 2 divisors, whose sum is σ = 21736068. Its totient is φ = 21736066.

The previous prime is 21736037. The next prime is 21736093. The reversal of 21736067 is 76063712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21736067 - 2⁶ = 21736003 is a prime.

It is not a weakly prime, because it can be changed into another prime (21736037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10868033 + 10868034.

It is an arithmetic number, because the mean of its divisors is an integer number (10868034).

Almost surely, 2^21736067 is an apocalyptic number.

21736067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21736067 is an equidigital number, since it uses as much as digits as its factorization.

21736067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 21736067 is about 4662.1955128459. The cubic root of 21736067 is about 279.0788906884.

Adding to 21736067 its reverse (76063712), we get a palindrome (97799779).

The spelling of 21736067 in words is "twenty-one million, seven hundred thirty-six thousand, sixty-seven".