18383654920 has 16 divisors (see below), whose sum is σ = 41363223660. Its totient is φ = 7353461952.

The previous prime is 18383654893. The next prime is 18383654951. The reversal of 18383654920 is 2945638381.

It can be written as a sum of positive squares in 2 ways, for example, as 17972619844 + 411035076 = 134062^2 + 20274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229795647 + ... + 229795726.

Almost surely, 2^18383654920 is an apocalyptic number.

18383654920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18383654920 is an abundant number, since it is smaller than the sum of its proper divisors (22979568740).

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

18383654920 is a wasteful number, since it uses less digits than its factorization.

18383654920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459591384 (or 459591380 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 18383654920 in words is "eighteen billion, three hundred eighty-three million, six hundred fifty-four thousand, nine hundred twenty".