18419850 has 36 divisors (see below), whose sum is σ = 49489206. Its totient is φ = 4911840.

The previous prime is 18419839. The next prime is 18419851. The reversal of 18419850 is 5891481.

It can be written as a sum of positive squares in 3 ways, for example, as 11716929 + 6702921 = 3423^2 + 2589^2 .

It is not an unprimeable number, because it can be changed into a prime (18419851) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20017 + ... + 20916.

Almost surely, 2^18419850 is an apocalyptic number.

18419850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18419850 is an abundant number, since it is smaller than the sum of its proper divisors (31069356).

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

18419850 is a wasteful number, since it uses less digits than its factorization.

18419850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40951 (or 40943 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18419850 is about 4291.8352717689. The cubic root of 18419850 is about 264.0961254637.

The spelling of 18419850 in words is "eighteen million, four hundred nineteen thousand, eight hundred fifty".