20622220 has 24 divisors (see below), whose sum is σ = 45586800. Its totient is φ = 7814592.

The previous prime is 20622197. The next prime is 20622229. The reversal of 20622220 is 2222602.

It is a junction number, because it is equal to n+sod(n) for n = 20622194 and 20622203.

It is not an unprimeable number, because it can be changed into a prime (20622229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26755 + ... + 27514.

It is an arithmetic number, because the mean of its divisors is an integer number (1899450).

Almost surely, 2^20622220 is an apocalyptic number.

20622220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20622220 is an abundant number, since it is smaller than the sum of its proper divisors (24964580).

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

20622220 is a wasteful number, since it uses less digits than its factorization.

20622220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54297 (or 54295 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20622220 is about 4541.1694529053. The cubic root of 20622220 is about 274.2280056440.

Adding to 20622220 its reverse (2222602), we get a palindrome (22844822).

The spelling of 20622220 in words is "twenty million, six hundred twenty-two thousand, two hundred twenty".