18819294 has 64 divisors (see below), whose sum is σ = 43051008. Its totient is φ = 5443200.

The previous prime is 18819277. The next prime is 18819319. The reversal of 18819294 is 49291881.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103884 + ... + 104064.

It is an arithmetic number, because the mean of its divisors is an integer number (672672).

Almost surely, 2^18819294 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18819294, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21525504).

18819294 is an abundant number, since it is smaller than the sum of its proper divisors (24231714).

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

18819294 is a wasteful number, since it uses less digits than its factorization.

18819294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its digits is 41472, while the sum is 42.

The square root of 18819294 is about 4338.1210218250. The cubic root of 18819294 is about 265.9915104608.

It can be divided in two parts, 1881 and 9294, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 18819294 in words is "eighteen million, eight hundred nineteen thousand, two hundred ninety-four".