18576820443 has 6 divisors (see below), whose sum is σ = 24769408692. Its totient is φ = 12384389580.

The previous prime is 18576820439. The next prime is 18576820447. The reversal of 18576820443 is 34402867581.

It is an interprime number because it is at equal distance from previous prime (18576820439) and next prime (18576820447).

It is not a de Polignac number, because 18576820443 - 2² = 18576820439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18576820392 and 18576820401.

It is not an unprimeable number, because it can be changed into a prime (18576820447) 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 5 ways as a sum of consecutive naturals, for example, 196728 + ... + 275418.

It is an arithmetic number, because the mean of its divisors is an integer number (4128234782).

Almost surely, 2^18576820443 is an apocalyptic number.

18576820443 is a deficient number, since it is larger than the sum of its proper divisors (6192588249).

18576820443 is an frugal number, since it uses more digits than its factorization.

18576820443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157385 (or 78694 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

Multiplying 18576820443 by its sum of digits (48), we get a square (891687381264 = 944292²).

The spelling of 18576820443 in words is "eighteen billion, five hundred seventy-six million, eight hundred twenty thousand, four hundred forty-three".