21300449430 has 64 divisors (see below), whose sum is σ = 55828942848. Its totient is φ = 5169333120.

The previous prime is 21300449413. The next prime is 21300449459. The reversal of 21300449430 is 3494400312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 356934 + ... + 412313.

It is an arithmetic number, because the mean of its divisors is an integer number (872327232).

Almost surely, 2^21300449430 is an apocalyptic number.

21300449430 is an abundant number, since it is smaller than the sum of its proper divisors (34528493418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21300449430 is a wasteful number, since it uses less digits than its factorization.

21300449430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769341.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 21300449430 its reverse (3494400312), we get a palindrome (24794849742).

The spelling of 21300449430 in words is "twenty-one billion, three hundred million, four hundred forty-nine thousand, four hundred thirty".