20040024 has 16 divisors (see below), whose sum is σ = 50100120. Its totient is φ = 6680000.

The previous prime is 20039993. The next prime is 20040049. The reversal of 20040024 is 42004002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20039991 and 20040009.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417477 + ... + 417524.

Almost surely, 2^20040024 is an apocalyptic number.

20040024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20040024 is an abundant number, since it is smaller than the sum of its proper divisors (30060096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20040024 is a wasteful number, since it uses less digits than its factorization.

20040024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835010 (or 835006 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20040024 is about 4476.6085377214. The cubic root of 20040024 is about 271.6227107591.

Adding to 20040024 its reverse (42004002), we get a palindrome (62044026).

The spelling of 20040024 in words is "twenty million, forty thousand, twenty-four".