21795543371 has 4 divisors (see below), whose sum is σ = 24909192432. Its totient is φ = 18681894312.

The previous prime is 21795543347. The next prime is 21795543377. The reversal of 21795543371 is 17334559712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21795543371 - 2⁶ = 21795543307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21795543377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556824520 + ... + 1556824533.

It is an arithmetic number, because the mean of its divisors is an integer number (6227298108).

Almost surely, 2^21795543371 is an apocalyptic number.

21795543371 is a deficient number, since it is larger than the sum of its proper divisors (3113649061).

21795543371 is an equidigital number, since it uses as much as digits as its factorization.

21795543371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113649060.

The product of its digits is 793800, while the sum is 47.

The spelling of 21795543371 in words is "twenty-one billion, seven hundred ninety-five million, five hundred forty-three thousand, three hundred seventy-one".