21235367 has 2 divisors, whose sum is σ = 21235368. Its totient is φ = 21235366.

The previous prime is 21235343. The next prime is 21235427. The reversal of 21235367 is 76353212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21235367 - 2⁸ = 21235111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21285367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617683 + 10617684.

It is an arithmetic number, because the mean of its divisors is an integer number (10617684).

Almost surely, 2^21235367 is an apocalyptic number.

21235367 is a deficient number, since it is larger than the sum of its proper divisors (1).

21235367 is an equidigital number, since it uses as much as digits as its factorization.

21235367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 21235367 is about 4608.1847836214. The cubic root of 21235367 is about 276.9193203412.

Adding to 21235367 its reverse (76353212), we get a palindrome (97588579).

The spelling of 21235367 in words is "twenty-one million, two hundred thirty-five thousand, three hundred sixty-seven".