20628734848 has 64 divisors (see below), whose sum is σ = 41353268400. Its totient is φ = 10250108928.

The previous prime is 20628734839. The next prime is 20628734849. The reversal of 20628734848 is 84843782602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 20628734795 and 20628734804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628734849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22204848 + ... + 22205776.

Almost surely, 2^20628734848 is an apocalyptic number.

It is an amenable number.

20628734848 is an abundant number, since it is smaller than the sum of its proper divisors (20724533552).

20628734848 is an equidigital number, since it uses as much as digits as its factorization.

20628734848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 52.

The spelling of 20628734848 in words is "twenty billion, six hundred twenty-eight million, seven hundred thirty-four thousand, eight hundred forty-eight".