18642087750 has 128 divisors (see below), whose sum is σ = 54665694720. Its totient is φ = 4171632000.

The previous prime is 18642087743. The next prime is 18642087773. The reversal of 18642087750 is 5778024681.

It is a self number, because there is not a number n which added to its sum of digits gives 18642087750.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 20341 + ... + 194159.

It is an arithmetic number, because the mean of its divisors is an integer number (427075740).

Almost surely, 2^18642087750 is an apocalyptic number.

18642087750 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 18642087750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27332847360).

18642087750 is an abundant number, since it is smaller than the sum of its proper divisors (36023606970).

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

18642087750 is a wasteful number, since it uses less digits than its factorization.

18642087750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173863 (or 173853 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

It can be divided in two parts, 186420 and 87750, that added together give a triangular number (274170 = T₇₄₀).

The spelling of 18642087750 in words is "eighteen billion, six hundred forty-two million, eighty-seven thousand, seven hundred fifty".