18878388192146 has 64 divisors (see below), whose sum is σ = 34445742904320. Its totient is φ = 7579989668160.

The previous prime is 18878388192011. The next prime is 18878388192149. The reversal of 18878388192146 is 64129188387881.

It is not an unprimeable number, because it can be changed into a prime (18878388192149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7740581 + ... + 9882983.

It is an arithmetic number, because the mean of its divisors is an integer number (538214732880).

Almost surely, 2^{18878388192146} is an apocalyptic number.

18878388192146 is a deficient number, since it is larger than the sum of its proper divisors (15567354712174).

18878388192146 is a wasteful number, since it uses less digits than its factorization.

18878388192146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142799.

The product of its digits is 297271296, while the sum is 74.

The spelling of 18878388192146 in words is "eighteen trillion, eight hundred seventy-eight billion, three hundred eighty-eight million, one hundred ninety-two thousand, one hundred forty-six".