18450677850 has 48 divisors (see below), whose sum is σ = 49917474720. Its totient is φ = 4472891200.

The previous prime is 18450677821. The next prime is 18450677863. The reversal of 18450677850 is 5877605481.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18450677793 and 18450677802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5589465 + ... + 5592764.

It is an arithmetic number, because the mean of its divisors is an integer number (1039947390).

Almost surely, 2^18450677850 is an apocalyptic number.

18450677850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18450677850 is an abundant number, since it is smaller than the sum of its proper divisors (31466796870).

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

18450677850 is a wasteful number, since it uses less digits than its factorization.

18450677850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182255 (or 11182250 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 18450677850 in words is "eighteen billion, four hundred fifty million, six hundred seventy-seven thousand, eight hundred fifty".