21757884882 has 16 divisors (see below), whose sum is σ = 43517216352. Its totient is φ = 7252387200.

The previous prime is 21757884859. The next prime is 21757884923. The reversal of 21757884882 is 28848875712.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314757 + ... + 377607.

It is an arithmetic number, because the mean of its divisors is an integer number (2719826022).

Almost surely, 2^21757884882 is an apocalyptic number.

21757884882 is an abundant number, since it is smaller than the sum of its proper divisors (21759331470).

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

21757884882 is a wasteful number, since it uses less digits than its factorization.

21757884882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120553.

The product of its digits is 16056320, while the sum is 60.

The spelling of 21757884882 in words is "twenty-one billion, seven hundred fifty-seven million, eight hundred eighty-four thousand, eight hundred eighty-two".