20789274628 has 12 divisors (see below), whose sum is σ = 36403713360. Its totient is φ = 10388213672.

The previous prime is 20789274599. The next prime is 20789274647. The reversal of 20789274628 is 82647298702.

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, 1598626 + ... + 1611577.

It is an arithmetic number, because the mean of its divisors is an integer number (3033642780).

Almost surely, 2^20789274628 is an apocalyptic number.

It is an amenable number.

20789274628 is a deficient number, since it is larger than the sum of its proper divisors (15614438732).

20789274628 is a wasteful number, since it uses less digits than its factorization.

20789274628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211826 (or 3211824 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 20789274628 in words is "twenty billion, seven hundred eighty-nine million, two hundred seventy-four thousand, six hundred twenty-eight".