20023221218 has 64 divisors (see below), whose sum is σ = 40718426112. Its totient is φ = 7131170880.

The previous prime is 20023221181. The next prime is 20023221241. The reversal of 20023221218 is 81212232002.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20023221193 and 20023221202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157655 + ... + 254757.

It is an arithmetic number, because the mean of its divisors is an integer number (636225408).

Almost surely, 2^20023221218 is an apocalyptic number.

20023221218 is an abundant number, since it is smaller than the sum of its proper divisors (20695204894).

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

20023221218 is a wasteful number, since it uses less digits than its factorization.

20023221218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97239.

The product of its (nonzero) digits is 768, while the sum is 23.

The spelling of 20023221218 in words is "twenty billion, twenty-three million, two hundred twenty-one thousand, two hundred eighteen".