18237484772 has 12 divisors (see below), whose sum is σ = 34370644476. Its totient is φ = 8417300640.

The previous prime is 18237484721. The next prime is 18237484801. The reversal of 18237484772 is 27748473281.

It can be written as a sum of positive squares in 2 ways, for example, as 7269949696 + 10967535076 = 85264^2 + 104726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175360379 + ... + 175360482.

It is an arithmetic number, because the mean of its divisors is an integer number (2864220373).

Almost surely, 2^18237484772 is an apocalyptic number.

It is an amenable number.

18237484772 is a deficient number, since it is larger than the sum of its proper divisors (16133159704).

18237484772 is a wasteful number, since it uses less digits than its factorization.

18237484772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350720878 (or 350720876 counting only the distinct ones).

The product of its digits is 4214784, while the sum is 53.

The spelling of 18237484772 in words is "eighteen billion, two hundred thirty-seven million, four hundred eighty-four thousand, seven hundred seventy-two".