20628728630 has 16 divisors (see below), whose sum is σ = 38412115920. Its totient is φ = 7966957152.

The previous prime is 20628728611. The next prime is 20628728663. The reversal of 20628728630 is 3682782602.

20628728630 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35566484 + ... + 35567063.

It is an arithmetic number, because the mean of its divisors is an integer number (2400757245).

Almost surely, 2^20628728630 is an apocalyptic number.

20628728630 is a deficient number, since it is larger than the sum of its proper divisors (17783387290).

20628728630 is a wasteful number, since it uses less digits than its factorization.

20628728630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71133583.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 20628728630 in words is "twenty billion, six hundred twenty-eight million, seven hundred twenty-eight thousand, six hundred thirty".