20428460768 has 24 divisors (see below), whose sum is σ = 40977375768. Its totient is φ = 10021508224.

The previous prime is 20428460753. The next prime is 20428460779. The reversal of 20428460768 is 86706482402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6020846 + ... + 6024237.

It is an arithmetic number, because the mean of its divisors is an integer number (1707390657).

Almost surely, 2^20428460768 is an apocalyptic number.

It is an amenable number.

20428460768 is an abundant number, since it is smaller than the sum of its proper divisors (20548915000).

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

20428460768 is a wasteful number, since it uses less digits than its factorization.

20428460768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12045146 (or 12045138 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 47.

The spelling of 20428460768 in words is "twenty billion, four hundred twenty-eight million, four hundred sixty thousand, seven hundred sixty-eight".