18220966442 has 24 divisors (see below), whose sum is σ = 32090883264. Its totient is φ = 7735999992.

The previous prime is 18220966403. The next prime is 18220966493. The reversal of 18220966442 is 24466902281.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18220966393 and 18220966402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 858338 + ... + 879309.

It is an arithmetic number, because the mean of its divisors is an integer number (1337120136).

Almost surely, 2^18220966442 is an apocalyptic number.

18220966442 is a deficient number, since it is larger than the sum of its proper divisors (13869916822).

18220966442 is a wasteful number, since it uses less digits than its factorization.

18220966442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737770 (or 1737763 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 18220966442 in words is "eighteen billion, two hundred twenty million, nine hundred sixty-six thousand, four hundred forty-two".