20672224 has 24 divisors (see below), whose sum is σ = 40807368. Its totient is φ = 10308480.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672224 is 42227602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20672227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16914 + ... + 18094.

It is an arithmetic number, because the mean of its divisors is an integer number (1700307).

Almost surely, 2^20672224 is an apocalyptic number.

It is an amenable number.

20672224 is a deficient number, since it is larger than the sum of its proper divisors (20135144).

20672224 is a wasteful number, since it uses less digits than its factorization.

20672224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20672224 is about 4546.6717497528. The cubic root of 20672224 is about 274.4494727300.

Adding to 20672224 its reverse (42227602), we get a palindrome (62899826).

The spelling of 20672224 in words is "twenty million, six hundred seventy-two thousand, two hundred twenty-four".