21755071160 has 16 divisors (see below), whose sum is σ = 48948910200. Its totient is φ = 8702028448.

The previous prime is 21755071127. The next prime is 21755071187. The reversal of 21755071160 is 6117055712.

It is a self number, because there is not a number n which added to its sum of digits gives 21755071160.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271938350 + ... + 271938429.

Almost surely, 2^21755071160 is an apocalyptic number.

21755071160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21755071160 is an abundant number, since it is smaller than the sum of its proper divisors (27193839040).

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

21755071160 is a wasteful number, since it uses less digits than its factorization.

21755071160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543876790 (or 543876786 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 35.

The spelling of 21755071160 in words is "twenty-one billion, seven hundred fifty-five million, seventy-one thousand, one hundred sixty".