21717196160 has 384 divisors, whose sum is σ = 60656299200. Its totient is φ = 7414415360.

The previous prime is 21717196117. The next prime is 21717196187. The reversal of 21717196160 is 6169171712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158519612 + ... + 158519748.

Almost surely, 2^21717196160 is an apocalyptic number.

21717196160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21717196160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30328149600).

21717196160 is an abundant number, since it is smaller than the sum of its proper divisors (38939103040).

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

21717196160 is a wasteful number, since it uses less digits than its factorization.

21717196160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 41.

The spelling of 21717196160 in words is "twenty-one billion, seven hundred seventeen million, one hundred ninety-six thousand, one hundred sixty".