18990678382368 has 192 divisors, whose sum is σ = 62154143880192. Its totient is φ = 4932418913280.

The previous prime is 18990678382343. The next prime is 18990678382441. The reversal of 18990678382368 is 86328387609981.

It is a junction number, because it is equal to n+sod(n) for n = 18990678382293 and 18990678382302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216120330 + ... + 216208182.

It is an arithmetic number, because the mean of its divisors is an integer number (323719499376).

Almost surely, 2^{18990678382368} is an apocalyptic number.

It is an amenable number.

18990678382368 is an abundant number, since it is smaller than the sum of its proper divisors (43163465497824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18990678382368 is a wasteful number, since it uses less digits than its factorization.

18990678382368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117127 (or 117119 counting only the distinct ones).

The product of its (nonzero) digits is 1504935936, while the sum is 78.

The spelling of 18990678382368 in words is "eighteen trillion, nine hundred ninety billion, six hundred seventy-eight million, three hundred eighty-two thousand, three hundred sixty-eight".