21332935844 has 48 divisors (see below), whose sum is σ = 41823565056. Its totient is φ = 9437875200.

The previous prime is 21332935837. The next prime is 21332935847. The reversal of 21332935844 is 44853923312.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 21332935795 and 21332935804.

It is not an unprimeable number, because it can be changed into a prime (21332935847) 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 15 ways as a sum of consecutive naturals, for example, 345812 + ... + 402804.

It is an arithmetic number, because the mean of its divisors is an integer number (871324272).

Almost surely, 2^21332935844 is an apocalyptic number.

It is an amenable number.

21332935844 is a deficient number, since it is larger than the sum of its proper divisors (20490629212).

21332935844 is a wasteful number, since it uses less digits than its factorization.

21332935844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57236 (or 57234 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The spelling of 21332935844 in words is "twenty-one billion, three hundred thirty-two million, nine hundred thirty-five thousand, eight hundred forty-four".