18428815568 has 20 divisors (see below), whose sum is σ = 35986982400. Its totient is φ = 9141852384.

The previous prime is 18428815567. The next prime is 18428815577. The reversal of 18428815568 is 86551882481.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428815567) 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, 4532618 + ... + 4536681.

It is an arithmetic number, because the mean of its divisors is an integer number (1799349120).

Almost surely, 2^18428815568 is an apocalyptic number.

It is an amenable number.

18428815568 is a deficient number, since it is larger than the sum of its proper divisors (17558166832).

18428815568 is a wasteful number, since it uses less digits than its factorization.

18428815568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069434 (or 9069428 counting only the distinct ones).

The product of its digits is 4915200, while the sum is 56.

The spelling of 18428815568 in words is "eighteen billion, four hundred twenty-eight million, eight hundred fifteen thousand, five hundred sixty-eight".