21443232410 has 16 divisors (see below), whose sum is σ = 38608062696. Its totient is φ = 8575016448.

The previous prime is 21443232397. The next prime is 21443232443. The reversal of 21443232410 is 1423234412.

It can be written as a sum of positive squares in 4 ways, for example, as 16870632769 + 4572599641 = 129887^2 + 67621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21443232410.

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, 244739 + ... + 320598.

Almost surely, 2^21443232410 is an apocalyptic number.

21443232410 is a deficient number, since it is larger than the sum of its proper divisors (17164830286).

21443232410 is a wasteful number, since it uses less digits than its factorization.

21443232410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569137.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21443232410 its reverse (1423234412), we get a palindrome (22866466822).

The spelling of 21443232410 in words is "twenty-one billion, four hundred forty-three million, two hundred thirty-two thousand, four hundred ten".