20661875282 has 8 divisors (see below), whose sum is σ = 32061530700. Its totient is φ = 9974698384.

The previous prime is 20661875207. The next prime is 20661875303. The reversal of 20661875282 is 28257816602.

It can be written as a sum of positive squares in 2 ways, for example, as 18972583081 + 1689292201 = 137741^2 + 41101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 178119557 + ... + 178119672.

Almost surely, 2^20661875282 is an apocalyptic number.

20661875282 is a deficient number, since it is larger than the sum of its proper divisors (11399655418).

20661875282 is a wasteful number, since it uses less digits than its factorization.

20661875282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356239260.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 20661875282 in words is "twenty billion, six hundred sixty-one million, eight hundred seventy-five thousand, two hundred eighty-two".