21804259276801 has 4 divisors (see below), whose sum is σ = 21907596998704. Its totient is φ = 21700921554900.

The previous prime is 21804259276799. The next prime is 21804259276853. The reversal of 21804259276801 is 10867295240812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21804259276801 - 2¹ = 21804259276799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21804259246801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51668860635 + ... + 51668861056.

It is an arithmetic number, because the mean of its divisors is an integer number (5476899249676).

Almost surely, 2^{21804259276801} is an apocalyptic number.

It is an amenable number.

21804259276801 is a deficient number, since it is larger than the sum of its proper divisors (103337721903).

21804259276801 is a wasteful number, since it uses less digits than its factorization.

21804259276801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103337721902.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 21804259276801 in words is "twenty-one trillion, eight hundred four billion, two hundred fifty-nine million, two hundred seventy-six thousand, eight hundred one".