18811453448 has 16 divisors (see below), whose sum is σ = 35273910780. Its totient is φ = 9405077248.

The previous prime is 18811453447. The next prime is 18811453459. The reversal of 18811453448 is 84435411881.

It can be written as a sum of positive squares in 2 ways, for example, as 15316042564 + 3495410884 = 123758^2 + 59122^2 .

It is not an unprimeable number, because it can be changed into a prime (18811453447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55436 + ... + 201732.

Almost surely, 2^18811453448 is an apocalyptic number.

It is an amenable number.

18811453448 is a deficient number, since it is larger than the sum of its proper divisors (16462457332).

18811453448 is a wasteful number, since it uses less digits than its factorization.

18811453448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162376 (or 162372 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The spelling of 18811453448 in words is "eighteen billion, eight hundred eleven million, four hundred fifty-three thousand, four hundred forty-eight".