18247509956 has 24 divisors (see below), whose sum is σ = 34396128984. Its totient is φ = 8420313600.

The previous prime is 18247509953. The next prime is 18247509961. The reversal of 18247509956 is 65990574281.

It can be written as a sum of positive squares in 4 ways, for example, as 8561800900 + 9685709056 = 92530^2 + 98416^2 .

It is not an unprimeable number, because it can be changed into a prime (18247509953) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 265676 + ... + 327228.

It is an arithmetic number, because the mean of its divisors is an integer number (1433172041).

Almost surely, 2^18247509956 is an apocalyptic number.

It is an amenable number.

18247509956 is a deficient number, since it is larger than the sum of its proper divisors (16148619028).

18247509956 is a wasteful number, since it uses less digits than its factorization.

18247509956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67271 (or 67269 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 18247509956 in words is "eighteen billion, two hundred forty-seven million, five hundred nine thousand, nine hundred fifty-six".