18660035856 has 160 divisors (see below), whose sum is σ = 63635355648. Its totient is φ = 4561643520.

The previous prime is 18660035813. The next prime is 18660035857. The reversal of 18660035856 is 65853006681.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18660035857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85660 + ... + 211323.

Almost surely, 2^18660035856 is an apocalyptic number.

18660035856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18660035856 is an abundant number, since it is smaller than the sum of its proper divisors (44975319792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18660035856 is a wasteful number, since it uses less digits than its factorization.

18660035856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297029 (or 297023 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 18660035856 in words is "eighteen billion, six hundred sixty million, thirty-five thousand, eight hundred fifty-six".