21026627 has 2 divisors, whose sum is σ = 21026628. Its totient is φ = 21026626.

The previous prime is 21026609. The next prime is 21026633. The reversal of 21026627 is 72662012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21026627 - 2⁸ = 21026371 is a prime.

It is a Chen prime.

It is equal to p_1331558 and since 21026627 and 1331558 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 21026596 and 21026605.

It is not a weakly prime, because it can be changed into another prime (21026647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10513313 + 10513314.

It is an arithmetic number, because the mean of its divisors is an integer number (10513314).

Almost surely, 2^21026627 is an apocalyptic number.

21026627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21026627 is an equidigital number, since it uses as much as digits as its factorization.

21026627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 21026627 is about 4585.4800184932. The cubic root of 21026627 is about 276.0089745384.

Adding to 21026627 its reverse (72662012), we get a palindrome (93688639).

The spelling of 21026627 in words is "twenty-one million, twenty-six thousand, six hundred twenty-seven".