18887023650 has 96 divisors (see below), whose sum is σ = 51404709888. Its totient is φ = 4551188800.

The previous prime is 18887023627. The next prime is 18887023703. The reversal of 18887023650 is 5632078881.

It is a self number, because there is not a number n which added to its sum of digits gives 18887023650.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 241279 + ... + 309821.

It is an arithmetic number, because the mean of its divisors is an integer number (535465728).

Almost surely, 2^18887023650 is an apocalyptic number.

18887023650 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 18887023650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25702354944).

18887023650 is an abundant number, since it is smaller than the sum of its proper divisors (32517686238).

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

18887023650 is a wasteful number, since it uses less digits than its factorization.

18887023650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68736 (or 68731 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 18887023650 in words is "eighteen billion, eight hundred eighty-seven million, twenty-three thousand, six hundred fifty".