18298657908378 has 24 divisors (see below), whose sum is σ = 40297044467316. Its totient is φ = 5999559969600.

The previous prime is 18298657908367. The next prime is 18298657908457. The reversal of 18298657908378 is 87380975689281.

18298657908378 is a `hidden beast` number, since 1 + 8 + 2 + 9 + 8 + 6 + 579 + 0 + 8 + 37 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11252515943529 + 7046141964849 = 3354477^2 + 2654457^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18298657908297 and 18298657908306.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8332721083 + ... + 8332723278.

Almost surely, 2^{18298657908378} is an apocalyptic number.

18298657908378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18298657908378 is an abundant number, since it is smaller than the sum of its proper divisors (21998386558938).

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

18298657908378 is a wasteful number, since it uses less digits than its factorization.

18298657908378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665444430 (or 16665444427 counting only the distinct ones).

The product of its (nonzero) digits is 2926264320, while the sum is 81.

The spelling of 18298657908378 in words is "eighteen trillion, two hundred ninety-eight billion, six hundred fifty-seven million, nine hundred eight thousand, three hundred seventy-eight".