21672284589 has 20 divisors (see below), whose sum is σ = 33782243616. Its totient is φ = 13820006376.

The previous prime is 21672284581. The next prime is 21672284653. The reversal of 21672284589 is 98548227612.

21672284589 is a `hidden beast` number, since 2 + 167 + 2 + 28 + 458 + 9 = 666.

It is not a de Polignac number, because 21672284589 - 2³ = 21672284581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21672284581) 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 19 ways as a sum of consecutive naturals, for example, 5814639 + ... + 5818364.

Almost surely, 2^21672284589 is an apocalyptic number.

It is an amenable number.

21672284589 is a deficient number, since it is larger than the sum of its proper divisors (12109959027).

21672284589 is a wasteful number, since it uses less digits than its factorization.

21672284589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11633038 (or 11633029 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 21672284589 in words is "twenty-one billion, six hundred seventy-two million, two hundred eighty-four thousand, five hundred eighty-nine".