20068972225 has 27 divisors (see below), whose sum is σ = 25799644507. Its totient is φ = 15485684480.

The previous prime is 20068972211. The next prime is 20068972229. The reversal of 20068972225 is 52227986002.

The square root of 20068972225 is 141665.

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

It can be written as a sum of positive squares in 13 ways, for example, as 2680857729 + 17388114496 = 51777^2 + 131864^2 .

It is not a de Polignac number, because 20068972225 - 2¹⁹ = 20068447937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20068972229) 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, 20540937 + ... + 20541913.

Almost surely, 2^20068972225 is an apocalyptic number.

20068972225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20068972225 is the 141665-th square number.

20068972225 is the 70833-rd centered octagonal number.

It is an amenable number.

20068972225 is a deficient number, since it is larger than the sum of its proper divisors (5730672282).

20068972225 is an frugal number, since it uses more digits than its factorization.

20068972225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20068972225 in words is "twenty billion, sixty-eight million, nine hundred seventy-two thousand, two hundred twenty-five".