21010232344 has 16 divisors (see below), whose sum is σ = 39398500800. Its totient is φ = 10503965472.

The previous prime is 21010232317. The next prime is 21010232351. The reversal of 21010232344 is 44323201012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63607 + ... + 214630.

It is an arithmetic number, because the mean of its divisors is an integer number (2462406300).

Almost surely, 2^21010232344 is an apocalyptic number.

It is an amenable number.

21010232344 is a deficient number, since it is larger than the sum of its proper divisors (18388268456).

21010232344 is a wasteful number, since it uses less digits than its factorization.

21010232344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287682 (or 287678 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21010232344 its reverse (44323201012), we get a palindrome (65333433356).

The spelling of 21010232344 in words is "twenty-one billion, ten million, two hundred thirty-two thousand, three hundred forty-four".