20284647272 has 16 divisors (see below), whose sum is σ = 38069986500. Its totient is φ = 10132650880.

The previous prime is 20284647263. The next prime is 20284647283. The reversal of 20284647272 is 27274648202.

It can be written as a sum of positive squares in 2 ways, for example, as 14697682756 + 5586964516 = 121234^2 + 74746^2 .

It is a super-2 number, since 2×20284647272² (a number of 21 digits) contains 22 as substring.

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, 1200179 + ... + 1216962.

Almost surely, 2^20284647272 is an apocalyptic number.

It is an amenable number.

20284647272 is a deficient number, since it is larger than the sum of its proper divisors (17785339228).

20284647272 is a wasteful number, since it uses less digits than its factorization.

20284647272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418196 (or 2418192 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 44.

The spelling of 20284647272 in words is "twenty billion, two hundred eighty-four million, six hundred forty-seven thousand, two hundred seventy-two".