21679018833 has 16 divisors (see below), whose sum is σ = 29279369600. Its totient is φ = 14266571904.

The previous prime is 21679018819. The next prime is 21679018849. The reversal of 21679018833 is 33881097612.

It is not a de Polignac number, because 21679018833 - 2⁶ = 21679018769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21679018883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15358 + ... + 208791.

It is an arithmetic number, because the mean of its divisors is an integer number (1829960600).

Almost surely, 2^21679018833 is an apocalyptic number.

It is an amenable number.

21679018833 is a deficient number, since it is larger than the sum of its proper divisors (7600350767).

21679018833 is a wasteful number, since it uses less digits than its factorization.

21679018833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224568.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 21679018833 in words is "twenty-one billion, six hundred seventy-nine million, eighteen thousand, eight hundred thirty-three".