18698680161888 has 384 divisors, whose sum is σ = 55341232128000. Its totient is φ = 5493242437632.

The previous prime is 18698680161881. The next prime is 18698680162039. The reversal of 18698680161888 is 88816108689681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18698680161881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1798117713 + ... + 1798128111.

It is an arithmetic number, because the mean of its divisors is an integer number (144117792000).

Almost surely, 2^{18698680161888} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18698680161888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27670616064000).

18698680161888 is an abundant number, since it is smaller than the sum of its proper divisors (36642551966112).

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

18698680161888 is a wasteful number, since it uses less digits than its factorization.

18698680161888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11114 (or 11106 counting only the distinct ones).

The product of its (nonzero) digits is 509607936, while the sum is 78.

The spelling of 18698680161888 in words is "eighteen trillion, six hundred ninety-eight billion, six hundred eighty million, one hundred sixty-one thousand, eight hundred eighty-eight".