20216422 has 8 divisors (see below), whose sum is σ = 31370400. Its totient is φ = 9759624.

The previous prime is 20216411. The next prime is 20216447. The reversal of 20216422 is 22461202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20216422.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 174222 + ... + 174337.

It is an arithmetic number, because the mean of its divisors is an integer number (3921300).

Almost surely, 2^20216422 is an apocalyptic number.

20216422 is a deficient number, since it is larger than the sum of its proper divisors (11153978).

20216422 is a wasteful number, since it uses less digits than its factorization.

20216422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348590.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20216422 is about 4496.2675632128. The cubic root of 20216422 is about 272.4173505767.

Adding to 20216422 its reverse (22461202), we get a palindrome (42677624).

The spelling of 20216422 in words is "twenty million, two hundred sixteen thousand, four hundred twenty-two".