20840224468 has 24 divisors (see below), whose sum is σ = 43492643712. Its totient is φ = 8543197344.

The previous prime is 20840224451. The next prime is 20840224481. The reversal of 20840224468 is 86442204802.

It is a self number, because there is not a number n which added to its sum of digits gives 20840224468.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16179655 + ... + 16180942.

It is an arithmetic number, because the mean of its divisors is an integer number (1812193488).

Almost surely, 2^20840224468 is an apocalyptic number.

20840224468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20840224468 is an abundant number, since it is smaller than the sum of its proper divisors (22652419244).

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

20840224468 is a wasteful number, since it uses less digits than its factorization.

20840224468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32360631 (or 32360629 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 40.

The spelling of 20840224468 in words is "twenty billion, eight hundred forty million, two hundred twenty-four thousand, four hundred sixty-eight".