21343606944 has 48 divisors (see below), whose sum is σ = 61120332000. Its totient is φ = 6467759360.

The previous prime is 21343606943. The next prime is 21343606957. The reversal of 21343606944 is 44960634312.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21343606896 and 21343606905.

It is not an unprimeable number, because it can be changed into a prime (21343606943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10104819 + ... + 10106930.

It is an arithmetic number, because the mean of its divisors is an integer number (1273340250).

Almost surely, 2^21343606944 is an apocalyptic number.

21343606944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21343606944 is an abundant number, since it is smaller than the sum of its proper divisors (39776725056).

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

21343606944 is a wasteful number, since it uses less digits than its factorization.

21343606944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20211773 (or 20211765 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The spelling of 21343606944 in words is "twenty-one billion, three hundred forty-three million, six hundred six thousand, nine hundred forty-four".