20369218 has 8 divisors (see below), whose sum is σ = 30668220. Its totient is φ = 10146480.

The previous prime is 20369183. The next prime is 20369221. The reversal of 20369218 is 81296302.

It can be written as a sum of positive squares in 2 ways, for example, as 20313049 + 56169 = 4507^2 + 237^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20369218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18393 + ... + 19468.

Almost surely, 2^20369218 is an apocalyptic number.

20369218 is a deficient number, since it is larger than the sum of its proper divisors (10299002).

20369218 is a wasteful number, since it uses less digits than its factorization.

20369218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38132.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20369218 is about 4513.2270051483. The cubic root of 20369218 is about 273.1019401310.

The spelling of 20369218 in words is "twenty million, three hundred sixty-nine thousand, two hundred eighteen".