21044310434 has 16 divisors (see below), whose sum is σ = 37974696000. Its totient is φ = 8544306384.

The previous prime is 21044310431. The next prime is 21044310473. The reversal of 21044310434 is 43401344012.

It is a super-3 number, since 3×21044310434³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21044310431) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39556709 + ... + 39557240.

It is an arithmetic number, because the mean of its divisors is an integer number (2373418500).

Almost surely, 2^21044310434 is an apocalyptic number.

21044310434 is a deficient number, since it is larger than the sum of its proper divisors (16930385566).

21044310434 is a wasteful number, since it uses less digits than its factorization.

21044310434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79113977.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21044310434 its reverse (43401344012), we get a palindrome (64445654446).

The spelling of 21044310434 in words is "twenty-one billion, forty-four million, three hundred ten thousand, four hundred thirty-four".