20653224 has 32 divisors (see below), whose sum is σ = 51952320. Its totient is φ = 6841856.

The previous prime is 20653189. The next prime is 20653229. The reversal of 20653224 is 42235602.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20653194 and 20653203.

It is not an unprimeable number, because it can be changed into a prime (20653229) 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 in 7 ways as a sum of consecutive naturals, for example, 1432 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (1623510).

Almost surely, 2^20653224 is an apocalyptic number.

20653224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20653224 is an abundant number, since it is smaller than the sum of its proper divisors (31299096).

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

20653224 is a wasteful number, since it uses less digits than its factorization.

20653224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329 (or 5325 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20653224 is about 4544.5818289475. The cubic root of 20653224 is about 274.3653640830.

Adding to 20653224 its reverse (42235602), we get a palindrome (62888826).

The spelling of 20653224 in words is "twenty million, six hundred fifty-three thousand, two hundred twenty-four".