21023039379568 has 80 divisors (see below), whose sum is σ = 43359773207616. Its totient is φ = 9853598177280.

The previous prime is 21023039379509. The next prime is 21023039379583. The reversal of 21023039379568 is 86597393032012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1725378 + ... + 6709918.

Almost surely, 2^{21023039379568} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21023039379568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21679886603808).

21023039379568 is an abundant number, since it is smaller than the sum of its proper divisors (22336733828048).

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

21023039379568 is a wasteful number, since it uses less digits than its factorization.

21023039379568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984802 (or 4984796 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 58.

The spelling of 21023039379568 in words is "twenty-one trillion, twenty-three billion, thirty-nine million, three hundred seventy-nine thousand, five hundred sixty-eight".