18190519452 has 144 divisors (see below), whose sum is σ = 55762237440. Its totient is φ = 4880964096.

The previous prime is 18190519447. The next prime is 18190519489. The reversal of 18190519452 is 25491509181.

18190519452 is a `hidden beast` number, since 1 + 8 + 1 + 90 + 519 + 45 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18190519398 and 18190519407.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2081949 + ... + 2090667.

It is an arithmetic number, because the mean of its divisors is an integer number (387237760).

Almost surely, 2^18190519452 is an apocalyptic number.

18190519452 is a gapful number since it is divisible by the number (12) 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 18190519452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27881118720).

18190519452 is an abundant number, since it is smaller than the sum of its proper divisors (37571717988).

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

18190519452 is a wasteful number, since it uses less digits than its factorization.

18190519452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240 (or 9235 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The spelling of 18190519452 in words is "eighteen billion, one hundred ninety million, five hundred nineteen thousand, four hundred fifty-two".