20240820680 has 64 divisors (see below), whose sum is σ = 47191161600. Its totient is φ = 7807887360.

The previous prime is 20240820671. The next prime is 20240820683. The reversal of 20240820680 is 8602804202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20240820683) by changing a digit.

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, 61400 + ... + 210360.

It is an arithmetic number, because the mean of its divisors is an integer number (737361900).

Almost surely, 2^20240820680 is an apocalyptic number.

20240820680 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 20240820680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23595580800).

20240820680 is an abundant number, since it is smaller than the sum of its proper divisors (26950340920).

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

20240820680 is a wasteful number, since it uses less digits than its factorization.

20240820680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149094 (or 149090 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The spelling of 20240820680 in words is "twenty billion, two hundred forty million, eight hundred twenty thousand, six hundred eighty".