18138692280464 has 20 divisors (see below), whose sum is σ = 40164247192704. Its totient is φ = 7773725263008.

The previous prime is 18138692280439. The next prime is 18138692280539. The reversal of 18138692280464 is 46408229683181.

It is a junction number, because it is equal to n+sod(n) for n = 18138692280397 and 18138692280406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80976304712 + ... + 80976304935.

Almost surely, 2^{18138692280464} is an apocalyptic number.

18138692280464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18138692280464 is an abundant number, since it is smaller than the sum of its proper divisors (22025554912240).

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

18138692280464 is a wasteful number, since it uses less digits than its factorization.

18138692280464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161952609662 (or 161952609656 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 62.

The spelling of 18138692280464 in words is "eighteen trillion, one hundred thirty-eight billion, six hundred ninety-two million, two hundred eighty thousand, four hundred sixty-four".