20523224 has 8 divisors (see below), whose sum is σ = 38481060. Its totient is φ = 10261608.

The previous prime is 20523221. The next prime is 20523227. The reversal of 20523224 is 42232502.

It is an interprime number because it is at equal distance from previous prime (20523221) and next prime (20523227).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×20523224³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20523196 and 20523205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523221) by changing a digit.

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 as a sum of consecutive naturals, namely, 1282694 + ... + 1282709.

Almost surely, 2^20523224 is an apocalyptic number.

It is an amenable number.

20523224 is a deficient number, since it is larger than the sum of its proper divisors (17957836).

20523224 is a wasteful number, since it uses less digits than its factorization.

20523224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565409 (or 2565405 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20523224 is about 4530.2565048792. The cubic root of 20523224 is about 273.7884953822.

Adding to 20523224 its reverse (42232502), we get a palindrome (62755726).

The spelling of 20523224 in words is "twenty million, five hundred twenty-three thousand, two hundred twenty-four".