18180920443 has 8 divisors (see below), whose sum is σ = 20789279712. Its totient is φ = 15575332416.

The previous prime is 18180920441. The next prime is 18180920449. The reversal of 18180920443 is 34402908181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18180920443 - 2¹ = 18180920441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18180920396 and 18180920405.

It is not an unprimeable number, because it can be changed into a prime (18180920441) 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, 678730 + ... + 705007.

It is an arithmetic number, because the mean of its divisors is an integer number (2598659964).

Almost surely, 2^18180920443 is an apocalyptic number.

18180920443 is a deficient number, since it is larger than the sum of its proper divisors (2608359269).

18180920443 is a wasteful number, since it uses less digits than its factorization.

18180920443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385621.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 18180920443 in words is "eighteen billion, one hundred eighty million, nine hundred twenty thousand, four hundred forty-three".