21033444313 has 8 divisors (see below), whose sum is σ = 24046424640. Its totient is φ = 18022514640.

The previous prime is 21033444301. The next prime is 21033444329. The reversal of 21033444313 is 31344433012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21033444313 - 2¹³ = 21033436121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033444613) by changing a digit.

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, 490618 + ... + 531763.

It is an arithmetic number, because the mean of its divisors is an integer number (3005803080).

Almost surely, 2^21033444313 is an apocalyptic number.

It is an amenable number.

21033444313 is a deficient number, since it is larger than the sum of its proper divisors (3012980327).

21033444313 is a wasteful number, since it uses less digits than its factorization.

21033444313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025327.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21033444313 its reverse (31344433012), we get a palindrome (52377877325).

The spelling of 21033444313 in words is "twenty-one billion, thirty-three million, four hundred forty-four thousand, three hundred thirteen".