20606224 has 20 divisors (see below), whose sum is σ = 40137436. Its totient is φ = 10248192.

The previous prime is 20606219. The next prime is 20606237. The reversal of 20606224 is 42260602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2458624 + 18147600 = 1568^2 + 4260^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20606195 and 20606204.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 249 + ... + 6424.

Almost surely, 2^20606224 is an apocalyptic number.

It is an amenable number.

20606224 is a deficient number, since it is larger than the sum of its proper divisors (19531212).

20606224 is a wasteful number, since it uses less digits than its factorization.

20606224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874 (or 6868 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20606224 is about 4539.4078909038. The cubic root of 20606224 is about 274.1570839903.

Adding to 20606224 its reverse (42260602), we get a palindrome (62866826).

The spelling of 20606224 in words is "twenty million, six hundred six thousand, two hundred twenty-four".