20568149056 has 189 divisors, whose sum is σ = 51674016159. Its totient is φ = 8095546368.

The previous prime is 20568149053. The next prime is 20568149087. The reversal of 20568149056 is 65094186502.

The square root of 20568149056 is 143416.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1280494656 + 19287654400 = 35784^2 + 138880^2 .

It is a super-2 number, since 2×20568149056² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20568148997 and 20568149015.

It is not an unprimeable number, because it can be changed into a prime (20568149053) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 104406750 + ... + 104406946.

Almost surely, 2^20568149056 is an apocalyptic number.

20568149056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20568149056 is the 143416-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20568149056

20568149056 is an abundant number, since it is smaller than the sum of its proper divisors (31105867103).

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

20568149056 is an equidigital number, since it uses as much as digits as its factorization.

20568149056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 20568149056 in words is "twenty billion, five hundred sixty-eight million, one hundred forty-nine thousand, fifty-six".