18687337404450 has 192 divisors, whose sum is σ = 54509943140352. Its totient is φ = 4176932025600.

The previous prime is 18687337404431. The next prime is 18687337404451. The reversal of 18687337404450 is 5440473378681.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18687337404451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18006597 + ... + 19016103.

It is an arithmetic number, because the mean of its divisors is an integer number (283905953856).

Almost surely, 2^{18687337404450} is an apocalyptic number.

18687337404450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18687337404450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27254971570176).

18687337404450 is an abundant number, since it is smaller than the sum of its proper divisors (35822605735902).

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

18687337404450 is a wasteful number, since it uses less digits than its factorization.

18687337404450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010409 (or 1010404 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 60.

The spelling of 18687337404450 in words is "eighteen trillion, six hundred eighty-seven billion, three hundred thirty-seven million, four hundred four thousand, four hundred fifty".