21030444022 has 16 divisors (see below), whose sum is σ = 36058875552. Its totient is φ = 9011376000.

The previous prime is 21030444011. The next prime is 21030444037. The reversal of 21030444022 is 22044403012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21030443984 and 21030444002.

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, 59523 + ... + 213550.

It is an arithmetic number, because the mean of its divisors is an integer number (2253679722).

Almost surely, 2^21030444022 is an apocalyptic number.

21030444022 is a deficient number, since it is larger than the sum of its proper divisors (15028431530).

21030444022 is a wasteful number, since it uses less digits than its factorization.

21030444022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278583.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21030444022 its reverse (22044403012), we get a palindrome (43074847034).

The spelling of 21030444022 in words is "twenty-one billion, thirty million, four hundred forty-four thousand, twenty-two".