20024340 has 120 divisors (see below), whose sum is σ = 65879520. Its totient is φ = 4544064.

The previous prime is 20024339. The next prime is 20024483. The reversal of 20024340 is 4342002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 143991 + ... + 144129.

It is an arithmetic number, because the mean of its divisors is an integer number (548996).

Almost surely, 2^20024340 is an apocalyptic number.

20024340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20024340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32939760).

20024340 is an abundant number, since it is smaller than the sum of its proper divisors (45855180).

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

20024340 is a wasteful number, since it uses less digits than its factorization.

20024340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20024340 is about 4474.8564222777. The cubic root of 20024340 is about 271.5518318944.

Adding to 20024340 its reverse (4342002), we get a palindrome (24366342).

The spelling of 20024340 in words is "twenty million, twenty-four thousand, three hundred forty".