18866870378 has 8 divisors (see below), whose sum is σ = 28902439872. Its totient is φ = 9232723756.

The previous prime is 18866870371. The next prime is 18866870381. The reversal of 18866870378 is 87307866881.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18866870378.

It is not an unprimeable number, because it can be changed into a prime (18866870371) 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, 100355600 + ... + 100355787.

It is an arithmetic number, because the mean of its divisors is an integer number (3612804984).

Almost surely, 2^18866870378 is an apocalyptic number.

18866870378 is a deficient number, since it is larger than the sum of its proper divisors (10035569494).

18866870378 is a wasteful number, since it uses less digits than its factorization.

18866870378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200711436.

The product of its (nonzero) digits is 21676032, while the sum is 62.

The spelling of 18866870378 in words is "eighteen billion, eight hundred sixty-six million, eight hundred seventy thousand, three hundred seventy-eight".