21044023368 has 16 divisors (see below), whose sum is σ = 52610058480. Its totient is φ = 7014674448.

The previous prime is 21044023331. The next prime is 21044023369. The reversal of 21044023368 is 86332044012.

It is not an unprimeable number, because it can be changed into a prime (21044023369) by changing a digit.

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, 438417130 + ... + 438417177.

It is an arithmetic number, because the mean of its divisors is an integer number (3288128655).

Almost surely, 2^21044023368 is an apocalyptic number.

It is an amenable number.

21044023368 is an abundant number, since it is smaller than the sum of its proper divisors (31566035112).

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

21044023368 is a wasteful number, since it uses less digits than its factorization.

21044023368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876834316 (or 876834312 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 21044023368 in words is "twenty-one billion, forty-four million, twenty-three thousand, three hundred sixty-eight".