26804020309 has 48 divisors (see below), whose sum is σ = 33378488640. Its totient is φ = 21368793600.

The previous prime is 26804020307. The next prime is 26804020319. The reversal of 26804020309 is 90302040862.

It is not a de Polignac number, because 26804020309 - 2¹ = 26804020307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26804020303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2378442 + ... + 2389684.

It is an arithmetic number, because the mean of its divisors is an integer number (695385180).

Almost surely, 2^26804020309 is an apocalyptic number.

It is an amenable number.

26804020309 is a deficient number, since it is larger than the sum of its proper divisors (6574468331).

26804020309 is a wasteful number, since it uses less digits than its factorization.

26804020309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362 (or 11351 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 26804020309 in words is "twenty-six billion, eight hundred four million, twenty thousand, three hundred nine".