20243477688 has 64 divisors (see below), whose sum is σ = 57982936320. Its totient is φ = 5769408000.

The previous prime is 20243477659. The next prime is 20243477689. The reversal of 20243477688 is 88677434202.

It is a self number, because there is not a number n which added to its sum of digits gives 20243477688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243477689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82878 + ... + 217613.

It is an arithmetic number, because the mean of its divisors is an integer number (905983380).

Almost surely, 2^20243477688 is an apocalyptic number.

20243477688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20243477688 is an abundant number, since it is smaller than the sum of its proper divisors (37739458632).

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

20243477688 is a wasteful number, since it uses less digits than its factorization.

20243477688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300908 (or 300904 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 20243477688 in words is "twenty billion, two hundred forty-three million, four hundred seventy-seven thousand, six hundred eighty-eight".