20132218 has 16 divisors (see below), whose sum is σ = 31194504. Its totient is φ = 9737280.

The previous prime is 20132201. The next prime is 20132219. The reversal of 20132218 is 81223102.

It can be written as a sum of positive squares in 4 ways, for example, as 19775809 + 356409 = 4447^2 + 597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20132195 and 20132204.

It is not an unprimeable number, because it can be changed into a prime (20132219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13888 + ... + 15268.

Almost surely, 2^20132218 is an apocalyptic number.

20132218 is a deficient number, since it is larger than the sum of its proper divisors (11062286).

20132218 is a wasteful number, since it uses less digits than its factorization.

20132218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20132218 is about 4486.8940259382. The cubic root of 20132218 is about 272.0386064722.

The spelling of 20132218 in words is "twenty million, one hundred thirty-two thousand, two hundred eighteen".