21056160797 has 4 divisors (see below), whose sum is σ = 24064183776. Its totient is φ = 18048137820.

The previous prime is 21056160701. The next prime is 21056160821. The reversal of 21056160797 is 79706165012.

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 21056160797 - 2¹⁶ = 21056095261 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 (21056160197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1504011479 + ... + 1504011492.

It is an arithmetic number, because the mean of its divisors is an integer number (6016045944).

Almost surely, 2^21056160797 is an apocalyptic number.

It is an amenable number.

21056160797 is a deficient number, since it is larger than the sum of its proper divisors (3008022979).

21056160797 is an equidigital number, since it uses as much as digits as its factorization.

21056160797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008022978.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 21056160797 in words is "twenty-one billion, fifty-six million, one hundred sixty thousand, seven hundred ninety-seven".