18738242783 has 8 divisors (see below), whose sum is σ = 20181169008. Its totient is φ = 17295534144.

The previous prime is 18738242759. The next prime is 18738242797. The reversal of 18738242783 is 38724283781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18738242783 - 2²⁰ = 18737194207 is a prime.

It is a super-2 number, since 2×18738242783² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18738242713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154091 + ... + 247427.

It is an arithmetic number, because the mean of its divisors is an integer number (2522646126).

Almost surely, 2^18738242783 is an apocalyptic number.

18738242783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18738242783 is a deficient number, since it is larger than the sum of its proper divisors (1442926225).

18738242783 is a wasteful number, since it uses less digits than its factorization.

18738242783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108793.

The product of its digits is 3612672, while the sum is 53.

The spelling of 18738242783 in words is "eighteen billion, seven hundred thirty-eight million, two hundred forty-two thousand, seven hundred eighty-three".