20206218 has 16 divisors (see below), whose sum is σ = 41505120. Its totient is φ = 6553296.

The previous prime is 20206211. The next prime is 20206223. The reversal of 20206218 is 81260202.

It is a junction number, because it is equal to n+sod(n) for n = 20206194 and 20206203.

It is not an unprimeable number, because it can be changed into a prime (20206211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45288 + ... + 45731.

It is an arithmetic number, because the mean of its divisors is an integer number (2594070).

Almost surely, 2^20206218 is an apocalyptic number.

20206218 is an abundant number, since it is smaller than the sum of its proper divisors (21298902).

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

20206218 is a wasteful number, since it uses less digits than its factorization.

20206218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91061.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20206218 is about 4495.1327010445. The cubic root of 20206218 is about 272.3715097176.

The spelling of 20206218 in words is "twenty million, two hundred six thousand, two hundred eighteen".