20422404 has 36 divisors (see below), whose sum is σ = 52399984.
Its totient is φ = 6705072.
The previous prime is 20422357. The next prime is 20422421. The reversal of 20422404 is 40422402.
It is a tau number, because it is divible by the number of its divisors (36).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1822 + ... + 6645.
Almost surely, 220422404 is an apocalyptic number.
It is an amenable number.
20422404 is an abundant number, since it is smaller than the sum of its proper divisors (31977580).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20422404 is a wasteful number, since it uses less digits than its factorization.
20422404 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8544 (or 8539 counting only the distinct ones).
The product of its (nonzero) digits is 512, while the sum is 18.
The square root of 20422404 is about 4519.1154001641.
The cubic root of 20422404 is about 273.3394320802.
Adding to 20422404 its reverse (40422402), we get a palindrome (60844806).
The spelling of 20422404 in words is "twenty million, four hundred twenty-two thousand, four hundred four".