18215026244 has 24 divisors (see below), whose sum is σ = 33763774968. Its totient is φ = 8568627200.

The previous prime is 18215026243. The next prime is 18215026279. The reversal of 18215026244 is 44262051281.

It can be written as a sum of positive squares in 4 ways, for example, as 2124103744 + 16090922500 = 46088^2 + 126850^2 .

It is not an unprimeable number, because it can be changed into a prime (18215026241) 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, 142652 + ... + 238284.

It is an arithmetic number, because the mean of its divisors is an integer number (1406823957).

Almost surely, 2^18215026244 is an apocalyptic number.

It is an amenable number.

18215026244 is a deficient number, since it is larger than the sum of its proper divisors (15548748724).

18215026244 is a wasteful number, since it uses less digits than its factorization.

18215026244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98455 (or 98453 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The spelling of 18215026244 in words is "eighteen billion, two hundred fifteen million, twenty-six thousand, two hundred forty-four".