21220848968 has 32 divisors (see below), whose sum is σ = 43624440000. Its totient is φ = 9597360960.

The previous prime is 21220848967. The next prime is 21220848997. The reversal of 21220848968 is 86984802212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21220848967) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 588383 + ... + 623406.

It is an arithmetic number, because the mean of its divisors is an integer number (1363263750).

Almost surely, 2^21220848968 is an apocalyptic number.

It is an amenable number.

21220848968 is an abundant number, since it is smaller than the sum of its proper divisors (22403591032).

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

21220848968 is a wasteful number, since it uses less digits than its factorization.

21220848968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212005 (or 1212001 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 21220848968 in words is "twenty-one billion, two hundred twenty million, eight hundred forty-eight thousand, nine hundred sixty-eight".