20239424 has 14 divisors (see below), whose sum is σ = 40162734. Its totient is φ = 10119680.

The previous prime is 20239423. The next prime is 20239433. The reversal of 20239424 is 42493202.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 4494400 = 3968^2 + 2120^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20239393 and 20239402.

It is not an unprimeable number, because it can be changed into a prime (20239423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158057 + ... + 158184.

Almost surely, 2^20239424 is an apocalyptic number.

It is an amenable number.

20239424 is a deficient number, since it is larger than the sum of its proper divisors (19923310).

20239424 is an equidigital number, since it uses as much as digits as its factorization.

20239424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316253 (or 316243 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20239424 is about 4498.8247354170. The cubic root of 20239424 is about 272.5206291371.

The spelling of 20239424 in words is "twenty million, two hundred thirty-nine thousand, four hundred twenty-four".