20440682226828 has 18 divisors (see below), whose sum is σ = 51669502295684. Its totient is φ = 6813560742264.

The previous prime is 20440682226779. The next prime is 20440682226857. The reversal of 20440682226828 is 82862228604402.

20440682226828 is a `hidden beast` number, since 2 + 0 + 4 + 406 + 8 + 2 + 226 + 8 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-4 number, since 4×20440682226828⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 283898364226 + ... + 283898364297.

Almost surely, 2^{20440682226828} is an apocalyptic number.

It is an amenable number.

20440682226828 is an abundant number, since it is smaller than the sum of its proper divisors (31228820068856).

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

20440682226828 is a wasteful number, since it uses less digits than its factorization.

20440682226828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567796728533 (or 567796728528 counting only the distinct ones).

The product of its (nonzero) digits is 9437184, while the sum is 54.

The spelling of 20440682226828 in words is "twenty trillion, four hundred forty billion, six hundred eighty-two million, two hundred twenty-six thousand, eight hundred twenty-eight".