26220643 has 2 divisors, whose sum is σ = 26220644. Its totient is φ = 26220642.

The previous prime is 26220631. The next prime is 26220661. The reversal of 26220643 is 34602262.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26220643 is a prime.

It is not a weakly prime, because it can be changed into another prime (26220673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13110321 + 13110322.

It is an arithmetic number, because the mean of its divisors is an integer number (13110322).

Almost surely, 2^26220643 is an apocalyptic number.

26220643 is a deficient number, since it is larger than the sum of its proper divisors (1).

26220643 is an equidigital number, since it uses as much as digits as its factorization.

26220643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 26220643 is about 5120.6096316747. The cubic root of 26220643 is about 297.0852653797.

The spelling of 26220643 in words is "twenty-six million, two hundred twenty thousand, six hundred forty-three".