21056160806 has 8 divisors (see below), whose sum is σ = 31633059600. Its totient is φ = 10511807608.

The previous prime is 21056160701. The next prime is 21056160821. The reversal of 21056160806 is 60806165012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8134781 + ... + 8137368.

It is an arithmetic number, because the mean of its divisors is an integer number (3954132450).

Almost surely, 2^21056160806 is an apocalyptic number.

21056160806 is a deficient number, since it is larger than the sum of its proper divisors (10576898794).

21056160806 is a wasteful number, since it uses less digits than its factorization.

21056160806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16272798.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 21056160806 in words is "twenty-one billion, fifty-six million, one hundred sixty thousand, eight hundred six".