18961444323 has 12 divisors (see below), whose sum is σ = 27495327288. Its totient is φ = 12591774720.

The previous prime is 18961444321. The next prime is 18961444331. The reversal of 18961444323 is 32344416981.

18961444323 is a `hidden beast` number, since 1 + 8 + 9 + 614 + 4 + 4 + 3 + 23 = 666.

It is not a de Polignac number, because 18961444323 - 2¹ = 18961444321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18961444321) 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 11 ways as a sum of consecutive naturals, for example, 4096573 + ... + 4101198.

It is an arithmetic number, because the mean of its divisors is an integer number (2291277274).

Almost surely, 2^18961444323 is an apocalyptic number.

18961444323 is a deficient number, since it is larger than the sum of its proper divisors (8533882965).

18961444323 is a wasteful number, since it uses less digits than its factorization.

18961444323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8198034 (or 8198031 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 18961444323 in words is "eighteen billion, nine hundred sixty-one million, four hundred forty-four thousand, three hundred twenty-three".