20218222004 has 12 divisors (see below), whose sum is σ = 35577369828. Its totient is φ = 10053259200.

The previous prime is 20218221997. The next prime is 20218222007. The reversal of 20218222004 is 40022281202.

It can be written as a sum of positive squares in 2 ways, for example, as 7358208400 + 12860013604 = 85780^2 + 113402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20218222007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13962137 + ... + 13963584.

It is an arithmetic number, because the mean of its divisors is an integer number (2964780819).

Almost surely, 2^20218222004 is an apocalyptic number.

It is an amenable number.

20218222004 is a deficient number, since it is larger than the sum of its proper divisors (15359147824).

20218222004 is a wasteful number, since it uses less digits than its factorization.

20218222004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27925906 (or 27925904 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The spelling of 20218222004 in words is "twenty billion, two hundred eighteen million, two hundred twenty-two thousand, four".