21440032030 has 16 divisors (see below), whose sum is σ = 38594621520. Its totient is φ = 8575443072.

The previous prime is 21440031953. The next prime is 21440032039. The reversal of 21440032030 is 3023004412.

It is a junction number, because it is equal to n+sod(n) for n = 21440031989 and 21440032007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440032039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108406 + ... + 233734.

It is an arithmetic number, because the mean of its divisors is an integer number (2412163845).

Almost surely, 2^21440032030 is an apocalyptic number.

21440032030 is a deficient number, since it is larger than the sum of its proper divisors (17154589490).

21440032030 is a wasteful number, since it uses less digits than its factorization.

21440032030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142443.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21440032030 its reverse (3023004412), we get a palindrome (24463036442).

The spelling of 21440032030 in words is "twenty-one billion, four hundred forty million, thirty-two thousand, thirty".