20422422 has 16 divisors (see below), whose sum is σ = 45383280. Its totient is φ = 6807456.

The previous prime is 20422421. The next prime is 20422427. The reversal of 20422422 is 22422402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20422395 and 20422404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422421) 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, 189043 + ... + 189150.

It is an arithmetic number, because the mean of its divisors is an integer number (2836455).

Almost surely, 2^20422422 is an apocalyptic number.

20422422 is an abundant number, since it is smaller than the sum of its proper divisors (24960858).

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

20422422 is a wasteful number, since it uses less digits than its factorization.

20422422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378204 (or 378198 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 20422422 is about 4519.1173917038. The cubic root of 20422422 is about 273.3395123859.

Adding to 20422422 its reverse (22422402), we get a palindrome (42844824).

The spelling of 20422422 in words is "twenty million, four hundred twenty-two thousand, four hundred twenty-two".