20728571193 has 32 divisors (see below), whose sum is σ = 34655932800. Its totient is φ = 12129566400.

The previous prime is 20728571177. The next prime is 20728571209. The reversal of 20728571193 is 39117582702.

20728571193 is a `hidden beast` number, since 2 + 0 + 72 + 8 + 571 + 1 + 9 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (20728571177) and next prime (20728571209).

It is not a de Polignac number, because 20728571193 - 2⁴ = 20728571177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20728571173) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1194718 + ... + 1211943.

It is an arithmetic number, because the mean of its divisors is an integer number (1082997900).

Almost surely, 2^20728571193 is an apocalyptic number.

It is an amenable number.

20728571193 is a deficient number, since it is larger than the sum of its proper divisors (13927361607).

20728571193 is a wasteful number, since it uses less digits than its factorization.

20728571193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406710 (or 2406704 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 20728571193 in words is "twenty billion, seven hundred twenty-eight million, five hundred seventy-one thousand, one hundred ninety-three".