18809450 has 36 divisors (see below), whose sum is σ = 38467590. Its totient is φ = 6837600.

The previous prime is 18809443. The next prime is 18809471. The reversal of 18809450 is 5490881.

It can be written as a sum of positive squares in 3 ways, for example, as 10817521 + 7991929 = 3289^2 + 2827^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18809450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4496 + ... + 7604.

Almost surely, 2^18809450 is an apocalyptic number.

18809450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18809450 is an abundant number, since it is smaller than the sum of its proper divisors (19658140).

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

18809450 is a wasteful number, since it uses less digits than its factorization.

18809450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3127 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18809450 is about 4336.9862808176. The cubic root of 18809450 is about 265.9451240747.

The spelling of 18809450 in words is "eighteen million, eight hundred nine thousand, four hundred fifty".