21713859160 has 32 divisors (see below), whose sum is σ = 55835638560. Its totient is φ = 7444751616.

The previous prime is 21713859151. The next prime is 21713859179. The reversal of 21713859160 is 6195831712.

It is a congruent number.

It is an unprimeable number.

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, 38774469 + ... + 38775028.

It is an arithmetic number, because the mean of its divisors is an integer number (1744863705).

Almost surely, 2^21713859160 is an apocalyptic number.

21713859160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21713859160 is an abundant number, since it is smaller than the sum of its proper divisors (34121779400).

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

21713859160 is a wasteful number, since it uses less digits than its factorization.

21713859160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77549515 (or 77549511 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 21713859160 in words is "twenty-one billion, seven hundred thirteen million, eight hundred fifty-nine thousand, one hundred sixty".