21113430244 has 12 divisors (see below), whose sum is σ = 38554959744. Its totient is φ = 10097727464.

The previous prime is 21113430223. The next prime is 21113430253. The reversal of 21113430244 is 44203431112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114746812 + ... + 114746995.

It is an arithmetic number, because the mean of its divisors is an integer number (3212913312).

Almost surely, 2^21113430244 is an apocalyptic number.

It is an amenable number.

21113430244 is a deficient number, since it is larger than the sum of its proper divisors (17441529500).

21113430244 is a wasteful number, since it uses less digits than its factorization.

21113430244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229493834 (or 229493832 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21113430244 its reverse (44203431112), we get a palindrome (65316861356).

The spelling of 21113430244 in words is "twenty-one billion, one hundred thirteen million, four hundred thirty thousand, two hundred forty-four".