18729944963 has 8 divisors (see below), whose sum is σ = 20351723520. Its totient is φ = 17171765640.

The previous prime is 18729944923. The next prime is 18729944977. The reversal of 18729944963 is 36944992781.

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 18729944963 - 2¹⁴ = 18729928579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18729944896 and 18729944905.

It is not an unprimeable number, because it can be changed into a prime (18729944903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15899195 + ... + 15900372.

It is an arithmetic number, because the mean of its divisors is an integer number (2543965440).

Almost surely, 2^18729944963 is an apocalyptic number.

18729944963 is a deficient number, since it is larger than the sum of its proper divisors (1621778557).

18729944963 is a wasteful number, since it uses less digits than its factorization.

18729944963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31799617.

The product of its digits is 23514624, while the sum is 62.

The spelling of 18729944963 in words is "eighteen billion, seven hundred twenty-nine million, nine hundred forty-four thousand, nine hundred sixty-three".