18581252190 has 64 divisors (see below), whose sum is σ = 46569600000. Its totient is φ = 4735931904.

The previous prime is 18581252159. The next prime is 18581252191. The reversal of 18581252190 is 9125218581.

It is a super-2 number, since 2×18581252190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18581252191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 955686 + ... + 974934.

It is an arithmetic number, because the mean of its divisors is an integer number (727650000).

Almost surely, 2^18581252190 is an apocalyptic number.

18581252190 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 18581252190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23284800000).

18581252190 is an abundant number, since it is smaller than the sum of its proper divisors (27988347810).

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

18581252190 is a wasteful number, since it uses less digits than its factorization.

18581252190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20681.

The product of its (nonzero) digits is 57600, while the sum is 42.

The spelling of 18581252190 in words is "eighteen billion, five hundred eighty-one million, two hundred fifty-two thousand, one hundred ninety".