19441164321 has 16 divisors (see below), whose sum is σ = 28828710400. Its totient is φ = 12948632784.

The previous prime is 19441164319. The next prime is 19441164329. The reversal of 19441164321 is 12346114491.

19441164321 is a `hidden beast` number, since 1 + 9 + 4 + 4 + 1 + 1 + 643 + 2 + 1 = 666.

It is not a de Polignac number, because 19441164321 - 2¹ = 19441164319 is a prime.

It is a super-2 number, since 2×19441164321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19441164329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307921 + ... + 365646.

It is an arithmetic number, because the mean of its divisors is an integer number (1801794400).

Almost surely, 2^19441164321 is an apocalyptic number.

It is an amenable number.

19441164321 is a deficient number, since it is larger than the sum of its proper divisors (9387546079).

19441164321 is a wasteful number, since it uses less digits than its factorization.

19441164321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674645 (or 674639 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The spelling of 19441164321 in words is "nineteen billion, four hundred forty-one million, one hundred sixty-four thousand, three hundred twenty-one".