26804921 has 12 divisors (see below), whose sum is σ = 31666320. Its totient is φ = 22492080.

The previous prime is 26804893. The next prime is 26804923. The reversal of 26804921 is 12940862.

It is a de Polignac number, because none of the positive numbers 2^k-26804921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26804923) 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 in 11 ways as a sum of consecutive naturals, for example, 5351 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (2638860).

Almost surely, 2^26804921 is an apocalyptic number.

It is an amenable number.

26804921 is a deficient number, since it is larger than the sum of its proper divisors (4861399).

26804921 is a wasteful number, since it uses less digits than its factorization.

26804921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456 (or 14443 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 26804921 is about 5177.3469074421. The cubic root of 26804921 is about 299.2757380745.

The spelling of 26804921 in words is "twenty-six million, eight hundred four thousand, nine hundred twenty-one".