21034044442 has 16 divisors (see below), whose sum is σ = 31989859200. Its totient is φ = 10371382560.

The previous prime is 21034044413. The next prime is 21034044497. The reversal of 21034044442 is 24444043012.

It is a self number, because there is not a number n which added to its sum of digits gives 21034044442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88434 + ... + 223357.

It is an arithmetic number, because the mean of its divisors is an integer number (1999366200).

Almost surely, 2^21034044442 is an apocalyptic number.

21034044442 is a deficient number, since it is larger than the sum of its proper divisors (10955814758).

21034044442 is a wasteful number, since it uses less digits than its factorization.

21034044442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312261.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21034044442 its reverse (24444043012), we get a palindrome (45478087454).

The spelling of 21034044442 in words is "twenty-one billion, thirty-four million, forty-four thousand, four hundred forty-two".