21310856808676 has 12 divisors (see below), whose sum is σ = 38161301727472. Its totient is φ = 10407627743688.

The previous prime is 21310856808649. The next prime is 21310856808701. The reversal of 21310856808676 is 67680865801312.

It is an unprimeable number.

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, 61950164970 + ... + 61950165313.

Almost surely, 2^{21310856808676} is an apocalyptic number.

It is an amenable number.

21310856808676 is a deficient number, since it is larger than the sum of its proper divisors (16850444918796).

21310856808676 is a wasteful number, since it uses less digits than its factorization.

21310856808676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123900330330 (or 123900330328 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 21310856808676 in words is "twenty-one trillion, three hundred ten billion, eight hundred fifty-six million, eight hundred eight thousand, six hundred seventy-six".