21076635889 has 8 divisors (see below), whose sum is σ = 21679713792. Its totient is φ = 20478690960.

The previous prime is 21076635823. The next prime is 21076635893. The reversal of 21076635889 is 98853667012.

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

It is a cyclic number.

It is not a de Polignac number, because 21076635889 - 2¹¹ = 21076633841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21076635589) 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 7 ways as a sum of consecutive naturals, for example, 1274914 + ... + 1291339.

It is an arithmetic number, because the mean of its divisors is an integer number (2709964224).

Almost surely, 2^21076635889 is an apocalyptic number.

It is an amenable number.

21076635889 is a deficient number, since it is larger than the sum of its proper divisors (603077903).

21076635889 is a wasteful number, since it uses less digits than its factorization.

21076635889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566487.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 21076635889 in words is "twenty-one billion, seventy-six million, six hundred thirty-five thousand, eight hundred eighty-nine".