18866952203 has 8 divisors (see below), whose sum is σ = 20813390640. Its totient is φ = 16959057280.

The previous prime is 18866952193. The next prime is 18866952217. The reversal of 18866952203 is 30225966881.

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

It is not a de Polignac number, because 18866952203 - 2¹⁶ = 18866886667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18866952263) 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, 9634850 + ... + 9636807.

It is an arithmetic number, because the mean of its divisors is an integer number (2601673830).

Almost surely, 2^18866952203 is an apocalyptic number.

18866952203 is a deficient number, since it is larger than the sum of its proper divisors (1946438437).

18866952203 is a wasteful number, since it uses less digits than its factorization.

18866952203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19271757.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 18866952203 in words is "eighteen billion, eight hundred sixty-six million, nine hundred fifty-two thousand, two hundred three".