21045010444 has 12 divisors (see below), whose sum is σ = 36829802464. Its totient is φ = 10522209744.

The previous prime is 21045010433. The next prime is 21045010453. The reversal of 21045010444 is 44401054012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195622 + ... + 283474.

Almost surely, 2^21045010444 is an apocalyptic number.

It is an amenable number.

21045010444 is a deficient number, since it is larger than the sum of its proper divisors (15784792020).

21045010444 is a wasteful number, since it uses less digits than its factorization.

21045010444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147744 (or 147742 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 21045010444 its reverse (44401054012), we get a palindrome (65446064456).

The spelling of 21045010444 in words is "twenty-one billion, forty-five million, ten thousand, four hundred forty-four".