22420620 has 108 divisors (see below), whose sum is σ = 72412704. Its totient is φ = 5614080.

The previous prime is 22420609. The next prime is 22420633. The reversal of 22420620 is 2602422.

It is a happy number.

22420620 is a `hidden beast` number, since 2 + 2 + 42 + 0 + 620 = 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 = 22420593 and 22420602.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 51805 + ... + 52235.

It is an arithmetic number, because the mean of its divisors is an integer number (670488).

Almost surely, 2^22420620 is an apocalyptic number.

22420620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22420620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36206352).

22420620 is an abundant number, since it is smaller than the sum of its proper divisors (49992084).

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

22420620 is a wasteful number, since it uses less digits than its factorization.

22420620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 458 counting only the distinct ones).

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

The square root of 22420620 is about 4735.0417104815. The cubic root of 22420620 is about 281.9784199572.

The spelling of 22420620 in words is "twenty-two million, four hundred twenty thousand, six hundred twenty".