21950605912 has 64 divisors (see below), whose sum is σ = 45133200000. Its totient is φ = 9971953920.

The previous prime is 21950605907. The next prime is 21950605927.

21950605912 is nontrivially palindromic in base 10.

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 15 ways as a sum of consecutive naturals, for example, 337839 + ... + 397537.

It is an arithmetic number, because the mean of its divisors is an integer number (705206250).

Almost surely, 2^21950605912 is an apocalyptic number.

It is an amenable number.

21950605912 is an abundant number, since it is smaller than the sum of its proper divisors (23182594088).

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

21950605912 is a wasteful number, since it uses less digits than its factorization.

21950605912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59824 (or 59820 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 21950605912 in words is "twenty-one billion, nine hundred fifty million, six hundred five thousand, nine hundred twelve".