10804371821 has 4 divisors (see below), whose sum is σ = 10956546144. Its totient is φ = 10652197500.

The previous prime is 10804371817. The next prime is 10804371839. The reversal of 10804371821 is 12817340801.

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 10804371821 - 2² = 10804371817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10804371881) 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, 76087055 + ... + 76087196.

It is an arithmetic number, because the mean of its divisors is an integer number (2739136536).

Almost surely, 2^10804371821 is an apocalyptic number.

It is an amenable number.

10804371821 is a deficient number, since it is larger than the sum of its proper divisors (152174323).

10804371821 is an equidigital number, since it uses as much as digits as its factorization.

10804371821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152174322.

The product of its (nonzero) digits is 10752, while the sum is 35.

The spelling of 10804371821 in words is "ten billion, eight hundred four million, three hundred seventy-one thousand, eight hundred twenty-one".