22660020 has 96 divisors (see below), whose sum is σ = 72979200. Its totient is φ = 5830272.

The previous prime is 22660019. The next prime is 22660051. The reversal of 22660020 is 2006622.

22660020 is a `hidden beast` number, since 2 + 2 + 660 + 0 + 2 + 0 = 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 = 22659975 and 22660002.

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 31 ways as a sum of consecutive naturals, for example, 14937 + ... + 16383.

It is an arithmetic number, because the mean of its divisors is an integer number (760200).

Almost surely, 2^22660020 is an apocalyptic number.

22660020 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 22660020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36489600).

22660020 is an abundant number, since it is smaller than the sum of its proper divisors (50319180).

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

22660020 is a wasteful number, since it uses less digits than its factorization.

22660020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 22660020 is about 4760.2541948934. The cubic root of 22660020 is about 282.9784931235.

Adding to 22660020 its reverse (2006622), we get a palindrome (24666642).

The spelling of 22660020 in words is "twenty-two million, six hundred sixty thousand, twenty".