18668711250 has 320 divisors, whose sum is σ = 62380032000. Its totient is φ = 4041576000.

The previous prime is 18668711219. The next prime is 18668711291. The reversal of 18668711250 is 5211786681.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 18668711196 and 18668711205.

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 159 ways as a sum of consecutive naturals, for example, 4486671 + ... + 4490829.

It is an arithmetic number, because the mean of its divisors is an integer number (194937600).

Almost surely, 2^18668711250 is an apocalyptic number.

18668711250 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 18668711250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31190016000).

18668711250 is an abundant number, since it is smaller than the sum of its proper divisors (43711320750).

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

18668711250 is a wasteful number, since it uses less digits than its factorization.

18668711250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 18668711250 in words is "eighteen billion, six hundred sixty-eight million, seven hundred eleven thousand, two hundred fifty".