18187801448 has 16 divisors (see below), whose sum is σ = 35584829280. Its totient is φ = 8698513648.

The previous prime is 18187801417. The next prime is 18187801451. The reversal of 18187801448 is 84410878181.

It is a super-2 number, since 2×18187801448² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18187801396 and 18187801405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49423190 + ... + 49423557.

It is an arithmetic number, because the mean of its divisors is an integer number (2224051830).

Almost surely, 2^18187801448 is an apocalyptic number.

It is an amenable number.

18187801448 is a deficient number, since it is larger than the sum of its proper divisors (17397027832).

18187801448 is a wasteful number, since it uses less digits than its factorization.

18187801448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98846776 (or 98846772 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 50.

The spelling of 18187801448 in words is "eighteen billion, one hundred eighty-seven million, eight hundred one thousand, four hundred forty-eight".