20020424 has 16 divisors (see below), whose sum is σ = 39746700. Its totient is φ = 9421312.

The previous prime is 20020421. The next prime is 20020439. The reversal of 20020424 is 42402002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16957924 + 3062500 = 4118^2 + 1750^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20020399 and 20020408.

It is not an unprimeable number, because it can be changed into a prime (20020421) 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, 73469 + ... + 73740.

Almost surely, 2^20020424 is an apocalyptic number.

It is an amenable number.

20020424 is a deficient number, since it is larger than the sum of its proper divisors (19726276).

20020424 is a wasteful number, since it uses less digits than its factorization.

20020424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147232 (or 147228 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20020424 is about 4474.4188449451. The cubic root of 20020424 is about 271.5341290004.

Adding to 20020424 its reverse (42402002), we get a palindrome (62422426).

The spelling of 20020424 in words is "twenty million, twenty thousand, four hundred twenty-four".