21044305510 has 16 divisors (see below), whose sum is σ = 38078076672. Its totient is φ = 8373649600.

The previous prime is 21044305493. The next prime is 21044305567. The reversal of 21044305510 is 1550344012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5507071 + ... + 5510890.

It is an arithmetic number, because the mean of its divisors is an integer number (2379879792).

Almost surely, 2^21044305510 is an apocalyptic number.

21044305510 is a deficient number, since it is larger than the sum of its proper divisors (17033771162).

21044305510 is a wasteful number, since it uses less digits than its factorization.

21044305510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11018159.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21044305510 its reverse (1550344012), we get a palindrome (22594649522).

The spelling of 21044305510 in words is "twenty-one billion, forty-four million, three hundred five thousand, five hundred ten".