20394818 has 8 divisors (see below), whose sum is σ = 30613248. Its totient is φ = 10190404.

The previous prime is 20394817. The next prime is 20394823. The reversal of 20394818 is 81849302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20394811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1655 + ... + 6597.

It is an arithmetic number, because the mean of its divisors is an integer number (3826656).

Almost surely, 2^20394818 is an apocalyptic number.

20394818 is a deficient number, since it is larger than the sum of its proper divisors (10218430).

20394818 is a wasteful number, since it uses less digits than its factorization.

20394818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20394818 is about 4516.0622227777. The cubic root of 20394818 is about 273.2163035916.

It can be divided in two parts, 20394 and 818, that added together give a palindrome (21212).

The spelling of 20394818 in words is "twenty million, three hundred ninety-four thousand, eight hundred eighteen".