20213220318 has 16 divisors (see below), whose sum is σ = 42184112256. Its totient is φ = 6444794840.

The previous prime is 20213220311. The next prime is 20213220323. The reversal of 20213220318 is 81302231202.

It is a happy number.

It is a super-2 number, since 2×20213220318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213220311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73236168 + ... + 73236443.

It is an arithmetic number, because the mean of its divisors is an integer number (2636507016).

Almost surely, 2^20213220318 is an apocalyptic number.

20213220318 is an abundant number, since it is smaller than the sum of its proper divisors (21970891938).

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

20213220318 is a wasteful number, since it uses less digits than its factorization.

20213220318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146472639.

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 20213220318 in words is "twenty billion, two hundred thirteen million, two hundred twenty thousand, three hundred eighteen".