18269847556 has 27 divisors (see below), whose sum is σ = 33753037269. Its totient is φ = 8651705328.

The previous prime is 18269847539. The next prime is 18269847559. The reversal of 18269847556 is 65574896281.

The square root of 18269847556 is 135166.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2238236100 + 16031611456 = 47310^2 + 126616^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18269847494 and 18269847503.

It is not an unprimeable number, because it can be changed into a prime (18269847559) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5134530 + ... + 5138086.

Almost surely, 2^18269847556 is an apocalyptic number.

18269847556 is the 135166-th square number.

It is an amenable number.

18269847556 is a deficient number, since it is larger than the sum of its proper divisors (15483189713).

18269847556 is an frugal number, since it uses more digits than its factorization.

18269847556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156 (or 3578 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 61.

The spelling of 18269847556 in words is "eighteen billion, two hundred sixty-nine million, eight hundred forty-seven thousand, five hundred fifty-six".