20422120 has 16 divisors (see below), whose sum is σ = 45949860. Its totient is φ = 8168832.

The previous prime is 20422097. The next prime is 20422121. The reversal of 20422120 is 2122402.

It can be written as a sum of positive squares in 2 ways, for example, as 17189316 + 3232804 = 4146^2 + 1798^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20422120.

It is not an unprimeable number, because it can be changed into a prime (20422121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255237 + ... + 255316.

Almost surely, 2^20422120 is an apocalyptic number.

20422120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422120 is an abundant number, since it is smaller than the sum of its proper divisors (25527740).

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

20422120 is a wasteful number, since it uses less digits than its factorization.

20422120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510564 (or 510560 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20422120 is about 4519.0839779761. The cubic root of 20422120 is about 273.3381650279.

Adding to 20422120 its reverse (2122402), we get a palindrome (22544522).

The spelling of 20422120 in words is "twenty million, four hundred twenty-two thousand, one hundred twenty".