20775936228 has 48 divisors (see below), whose sum is σ = 48816433344. Its totient is φ = 6876904320.

The previous prime is 20775936217. The next prime is 20775936301. The reversal of 20775936228 is 82263957702.

It is a super-2 number, since 2×20775936228² (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 15 ways as a sum of consecutive naturals, for example, 4766226 + ... + 4770582.

It is an arithmetic number, because the mean of its divisors is an integer number (1017009028).

Almost surely, 2^20775936228 is an apocalyptic number.

It is an amenable number.

20775936228 is an abundant number, since it is smaller than the sum of its proper divisors (28040497116).

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

20775936228 is a wasteful number, since it uses less digits than its factorization.

20775936228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7052 (or 7050 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 20775936228 in words is "twenty billion, seven hundred seventy-five million, nine hundred thirty-six thousand, two hundred twenty-eight".