20873309028 has 288 divisors, whose sum is σ = 61571973120. Its totient is φ = 5410540800.

The previous prime is 20873308949. The next prime is 20873309063. The reversal of 20873309028 is 82090337802.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 164356701 + ... + 164356827.

Almost surely, 2^20873309028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20873309028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30785986560).

20873309028 is an abundant number, since it is smaller than the sum of its proper divisors (40698664092).

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

20873309028 is a wasteful number, since it uses less digits than its factorization.

20873309028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 20873309028 in words is "twenty billion, eight hundred seventy-three million, three hundred nine thousand, twenty-eight".