18887808950500 has 96 divisors (see below), whose sum is σ = 47186722372608. Its totient is φ = 6469947792000.

The previous prime is 18887808950489. The next prime is 18887808950501. The reversal of 18887808950500 is 505980878881.

It is a super-2 number, since 2×18887808950500² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18887808950501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1414210 + ... + 6306790.

It is an arithmetic number, because the mean of its divisors is an integer number (491528358048).

Almost surely, 2^{18887808950500} is an apocalyptic number.

18887808950500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18887808950500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23593361186304).

18887808950500 is an abundant number, since it is smaller than the sum of its proper divisors (28298913422108).

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

18887808950500 is a wasteful number, since it uses less digits than its factorization.

18887808950500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893710 (or 4893698 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 67.

The spelling of 18887808950500 in words is "eighteen trillion, eight hundred eighty-seven billion, eight hundred eight million, nine hundred fifty thousand, five hundred".