21953976832 has 40 divisors (see below), whose sum is σ = 44519846976. Its totient is φ = 10813135872.

The previous prime is 21953976829. The next prime is 21953976881. The reversal of 21953976832 is 23867935912.

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, 285688 + ... + 354295.

Almost surely, 2^21953976832 is an apocalyptic number.

It is an amenable number.

21953976832 is an abundant number, since it is smaller than the sum of its proper divisors (22565870144).

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

21953976832 is an frugal number, since it uses more digits than its factorization.

21953976832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640068 (or 640052 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 55.

The spelling of 21953976832 in words is "twenty-one billion, nine hundred fifty-three million, nine hundred seventy-six thousand, eight hundred thirty-two".