21954332968 has 32 divisors (see below), whose sum is σ = 43282071360. Its totient is φ = 10419735040.

The previous prime is 21954332957. The next prime is 21954332977. The reversal of 21954332968 is 86923345912.

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 7 ways as a sum of consecutive naturals, for example, 431305 + ... + 479512.

It is an arithmetic number, because the mean of its divisors is an integer number (1352564730).

Almost surely, 2^21954332968 is an apocalyptic number.

It is an amenable number.

21954332968 is a deficient number, since it is larger than the sum of its proper divisors (21327738392).

21954332968 is a wasteful number, since it uses less digits than its factorization.

21954332968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910977 (or 910973 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 52.

The spelling of 21954332968 in words is "twenty-one billion, nine hundred fifty-four million, three hundred thirty-two thousand, nine hundred sixty-eight".