21789241308 has 36 divisors (see below), whose sum is σ = 55105931608. Its totient is φ = 7259444640.

The previous prime is 21789241303. The next prime is 21789241403. The reversal of 21789241308 is 80314298712.

It is a happy number.

21789241308 is a `hidden beast` number, since 21 + 7 + 89 + 241 + 308 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21789241303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78091 + ... + 222882.

Almost surely, 2^21789241308 is an apocalyptic number.

It is an amenable number.

21789241308 is an abundant number, since it is smaller than the sum of its proper divisors (33316690300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21789241308 is a wasteful number, since it uses less digits than its factorization.

21789241308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302994 (or 302989 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 21789241308 in words is "twenty-one billion, seven hundred eighty-nine million, two hundred forty-one thousand, three hundred eight".