20620422 has 48 divisors (see below), whose sum is σ = 47960640. Its totient is φ = 6379776.

The previous prime is 20620399. The next prime is 20620423. The reversal of 20620422 is 22402602.

It is a happy number.

20620422 is a `hidden beast` number, since 2 + 0 + 620 + 42 + 2 = 666.

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 = 20620395 and 20620404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23748 + ... + 24600.

It is an arithmetic number, because the mean of its divisors is an integer number (999180).

Almost surely, 2^20620422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20620422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23980320).

20620422 is an abundant number, since it is smaller than the sum of its proper divisors (27340218).

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

20620422 is a wasteful number, since it uses less digits than its factorization.

20620422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20620422 is about 4540.9714819629. The cubic root of 20620422 is about 274.2200356601.

The spelling of 20620422 in words is "twenty million, six hundred twenty thousand, four hundred twenty-two".