18426685850 has 24 divisors (see below), whose sum is σ = 34355084988. Its totient is φ = 7353158400.

The previous prime is 18426685847. The next prime is 18426685867. The reversal of 18426685850 is 5858662481.

It can be written as a sum of positive squares in 6 ways, for example, as 1448335249 + 16978350601 = 38057^2 + 130301^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18426685792 and 18426685801.

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, 416639 + ... + 458738.

Almost surely, 2^18426685850 is an apocalyptic number.

18426685850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18426685850 is a deficient number, since it is larger than the sum of its proper divisors (15928399138).

18426685850 is a wasteful number, since it uses less digits than its factorization.

18426685850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875810 (or 875805 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 18426685850 in words is "eighteen billion, four hundred twenty-six million, six hundred eighty-five thousand, eight hundred fifty".