20424424240 has 80 divisors (see below), whose sum is σ = 54851087520. Its totient is φ = 6990172160.

The previous prime is 20424424231. The next prime is 20424424253. The reversal of 20424424240 is 4242442402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 20424424199 and 20424424208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667675 + ... + 697594.

It is an arithmetic number, because the mean of its divisors is an integer number (685638594).

Almost surely, 2^20424424240 is an apocalyptic number.

20424424240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424424240 is an abundant number, since it is smaller than the sum of its proper divisors (34426663280).

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

20424424240 is a wasteful number, since it uses less digits than its factorization.

20424424240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365310 (or 1365304 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20424424240 its reverse (4242442402), we get a palindrome (24666866642).

It can be divided in two parts, 204244 and 24240, that added together give a square (228484 = 478²).

The spelling of 20424424240 in words is "twenty billion, four hundred twenty-four million, four hundred twenty-four thousand, two hundred forty".