20024140 has 24 divisors (see below), whose sum is σ = 43408512. Its totient is φ = 7751040.

The previous prime is 20024131. The next prime is 20024143. The reversal of 20024140 is 4142002.

It is a self number, because there is not a number n which added to its sum of digits gives 20024140.

It is not an unprimeable number, because it can be changed into a prime (20024143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15529 + ... + 16768.

It is an arithmetic number, because the mean of its divisors is an integer number (1808688).

Almost surely, 2^20024140 is an apocalyptic number.

20024140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20024140 is an abundant number, since it is smaller than the sum of its proper divisors (23384372).

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

20024140 is a wasteful number, since it uses less digits than its factorization.

20024140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32337 (or 32335 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20024140 is about 4474.8340751362. The cubic root of 20024140 is about 271.5509278189.

Adding to 20024140 its reverse (4142002), we get a palindrome (24166142).

It can be divided in two parts, 20024 and 140, that added together give a square (20164 = 142²).

The spelling of 20024140 in words is "twenty million, twenty-four thousand, one hundred forty".