20240665305256 has 64 divisors (see below), whose sum is σ = 42089214605760. Its totient is φ = 9047903040000.

The previous prime is 20240665305209. The next prime is 20240665305353. The reversal of 20240665305256 is 65250356604202.

It is a super-2 number, since 2×20240665305256² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687466 + ... + 6399526.

It is an arithmetic number, because the mean of its divisors is an integer number (657643978215).

Almost surely, 2^{20240665305256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20240665305256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21044607302880).

20240665305256 is an abundant number, since it is smaller than the sum of its proper divisors (21848549300504).

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

20240665305256 is a wasteful number, since it uses less digits than its factorization.

20240665305256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5712746 (or 5712742 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 20240665305256 in words is "twenty trillion, two hundred forty billion, six hundred sixty-five million, three hundred five thousand, two hundred fifty-six".