26820011 has 4 divisors (see below), whose sum is σ = 26832312. Its totient is φ = 26807712.

The previous prime is 26820007. The next prime is 26820019. The reversal of 26820011 is 11002862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26820011 - 2² = 26820007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26820019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901 + ... + 7566.

It is an arithmetic number, because the mean of its divisors is an integer number (6708078).

Almost surely, 2^26820011 is an apocalyptic number.

26820011 is a deficient number, since it is larger than the sum of its proper divisors (12301).

26820011 is an equidigital number, since it uses as much as digits as its factorization.

26820011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12300.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 26820011 is about 5178.8040125110. The cubic root of 26820011 is about 299.3318872632.

Adding to 26820011 its reverse (11002862), we get a palindrome (37822873).

The spelling of 26820011 in words is "twenty-six million, eight hundred twenty thousand, eleven".