21035010805984 has 72 divisors (see below), whose sum is σ = 48174765779448. Its totient is φ = 9014848416000.

The previous prime is 21035010805969. The next prime is 21035010806011. The reversal of 21035010805984 is 48950801053012.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 166930587 + ... + 167056549.

It is an arithmetic number, because the mean of its divisors is an integer number (669093969159).

Almost surely, 2^{21035010805984} is an apocalyptic number.

It is an amenable number.

21035010805984 is an abundant number, since it is smaller than the sum of its proper divisors (27139754973464).

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

21035010805984 is a wasteful number, since it uses less digits than its factorization.

21035010805984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232488 (or 232473 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

Adding to 21035010805984 its reverse (48950801053012), we get a palindrome (69985811858996).

The spelling of 21035010805984 in words is "twenty-one trillion, thirty-five billion, ten million, eight hundred five thousand, nine hundred eighty-four".