20404024 has 32 divisors (see below), whose sum is σ = 40510800. Its totient is φ = 9607680.

The previous prime is 20404009. The next prime is 20404039. The reversal of 20404024 is 42040402.

It is an interprime number because it is at equal distance from previous prime (20404009) and next prime (20404039).

It is a junction number, because it is equal to n+sod(n) for n = 20403989 and 20404007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36354 + ... + 36910.

Almost surely, 2^20404024 is an apocalyptic number.

It is an amenable number.

20404024 is a deficient number, since it is larger than the sum of its proper divisors (20106776).

20404024 is a wasteful number, since it uses less digits than its factorization.

20404024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20404024 is about 4517.0813585766. The cubic root of 20404024 is about 273.2574063680.

Adding to 20404024 its reverse (42040402), we get a palindrome (62444426).

The spelling of 20404024 in words is "twenty million, four hundred four thousand, twenty-four".