18994350 has 48 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 5023200.

The previous prime is 18994337. The next prime is 18994361. The reversal of 18994350 is 5349981.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18994299 and 18994308.

It is a congruent number.

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, 20395 + ... + 21305.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^18994350 is an apocalyptic number.

18994350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18994350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23748480).

18994350 is an abundant number, since it is smaller than the sum of its proper divisors (28502610).

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

18994350 is a wasteful number, since it uses less digits than its factorization.

18994350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 18994350 is about 4358.2507959042. The cubic root of 18994350 is about 266.8137123038.

The spelling of 18994350 in words is "eighteen million, nine hundred ninety-four thousand, three hundred fifty".