18435085850 has 24 divisors (see below), whose sum is σ = 34323337020. Its totient is φ = 7366705920.

The previous prime is 18435085841. The next prime is 18435085909. The reversal of 18435085850 is 5858053481.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6573479929 + 11861605921 = 81077^2 + 108911^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18435085795 and 18435085804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132257 + ... + 233156.

Almost surely, 2^18435085850 is an apocalyptic number.

18435085850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18435085850 is a deficient number, since it is larger than the sum of its proper divisors (15888251170).

18435085850 is a wasteful number, since it uses less digits than its factorization.

18435085850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366434 (or 366429 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 47.

The spelling of 18435085850 in words is "eighteen billion, four hundred thirty-five million, eighty-five thousand, eight hundred fifty".