20218305422 has 24 divisors (see below), whose sum is σ = 37135666440. Its totient is φ = 8208935280.

The previous prime is 20218305421. The next prime is 20218305427. The reversal of 20218305422 is 22450381202.

It is a super-4 number, since 4×20218305422⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20218305421) 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 11 ways as a sum of consecutive naturals, for example, 5427329 + ... + 5431052.

It is an arithmetic number, because the mean of its divisors is an integer number (1547319435).

Almost surely, 2^20218305422 is an apocalyptic number.

20218305422 is a deficient number, since it is larger than the sum of its proper divisors (16917361018).

20218305422 is a wasteful number, since it uses less digits than its factorization.

20218305422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10858416 (or 10858409 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 20218305422 its reverse (22450381202), we get a palindrome (42668686624).

The spelling of 20218305422 in words is "twenty billion, two hundred eighteen million, three hundred five thousand, four hundred twenty-two".