1944966321 has 12 divisors (see below), whose sum is σ = 2818433280. Its totient is φ = 1292473080.

The previous prime is 1944966313. The next prime is 1944966337. The reversal of 1944966321 is 1236694491.

1944966321 is a `hidden beast` number, since 1 + 9 + 4 + 4 + 9 + 6 + 632 + 1 = 666.

It is not a de Polignac number, because 1944966321 - 2³ = 1944966313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1944966421) 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 11 ways as a sum of consecutive naturals, for example, 344641 + ... + 350238.

It is an arithmetic number, because the mean of its divisors is an integer number (234869440).

Almost surely, 2^1944966321 is an apocalyptic number.

It is an amenable number.

1944966321 is a deficient number, since it is larger than the sum of its proper divisors (873466959).

1944966321 is a wasteful number, since it uses less digits than its factorization.

1944966321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695196 (or 695193 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1944966321 is about 44101.7723113255. The cubic root of 1944966321 is about 1248.2570526505.

The spelling of 1944966321 in words is "one billion, nine hundred forty-four million, nine hundred sixty-six thousand, three hundred twenty-one".