18863623438673 has 8 divisors (see below), whose sum is σ = 20810151186216. Its totient is φ = 16987878518400.

The previous prime is 18863623438643. The next prime is 18863623438717. The reversal of 18863623438673 is 37683432636881.

It can be written as a sum of positive squares in 4 ways, for example, as 491152877329 + 18372470561344 = 700823^2 + 4286312^2 .

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 18863623438673 - 2⁸ = 18863623438417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18863623438643) 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, 17695706258 + ... + 17695707323.

It is an arithmetic number, because the mean of its divisors is an integer number (2601268898277).

Almost surely, 2^{18863623438673} is an apocalyptic number.

18863623438673 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18863623438673 is a deficient number, since it is larger than the sum of its proper divisors (1946527747543).

18863623438673 is a wasteful number, since it uses less digits than its factorization.

18863623438673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35391413635.

The product of its digits is 501645312, while the sum is 68.

The spelling of 18863623438673 in words is "eighteen trillion, eight hundred sixty-three billion, six hundred twenty-three million, four hundred thirty-eight thousand, six hundred seventy-three".