18983603983 has 4 divisors (see below), whose sum is σ = 18984790800. Its totient is φ = 18982417168.

The previous prime is 18983603959. The next prime is 18983603993. The reversal of 18983603983 is 38930638981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18983603983 - 2¹³ = 18983595791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18983603993) 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, 569083 + ... + 601516.

It is an arithmetic number, because the mean of its divisors is an integer number (4746197700).

Almost surely, 2^18983603983 is an apocalyptic number.

18983603983 is a deficient number, since it is larger than the sum of its proper divisors (1186817).

18983603983 is a wasteful number, since it uses less digits than its factorization.

18983603983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186816.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 18983603983 in words is "eighteen billion, nine hundred eighty-three million, six hundred three thousand, nine hundred eighty-three".