18272821842 has 48 divisors (see below), whose sum is σ = 43210308960. Its totient is φ = 5534654400.

The previous prime is 18272821829. The next prime is 18272821859. The reversal of 18272821842 is 24812827281.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431409 + ... + 471867.

It is an arithmetic number, because the mean of its divisors is an integer number (900214770).

Almost surely, 2^18272821842 is an apocalyptic number.

18272821842 is an abundant number, since it is smaller than the sum of its proper divisors (24937487118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18272821842 is a wasteful number, since it uses less digits than its factorization.

18272821842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42759 (or 42756 counting only the distinct ones).

The product of its digits is 229376, while the sum is 45.

The spelling of 18272821842 in words is "eighteen billion, two hundred seventy-two million, eight hundred twenty-one thousand, eight hundred forty-two".