42020824 has 8 divisors (see below), whose sum is σ = 78789060. Its totient is φ = 21010408.

The previous prime is 42020819. The next prime is 42020827. The reversal of 42020824 is 42802024.

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

It is a junction number, because it is equal to n+sod(n) for n = 42020795 and 42020804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626294 + ... + 2626309.

Almost surely, 2^42020824 is an apocalyptic number.

It is an amenable number.

42020824 is a deficient number, since it is larger than the sum of its proper divisors (36768236).

42020824 is a wasteful number, since it uses less digits than its factorization.

42020824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252609 (or 5252605 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 42020824 is about 6482.3471057943. The cubic root of 42020824 is about 347.6601032340.

Adding to 42020824 its reverse (42802024), we get a palindrome (84822848).

The spelling of 42020824 in words is "forty-two million, twenty thousand, eight hundred twenty-four".