20569263562225 has 27 divisors (see below), whose sum is σ = 29670342207681. Its totient is φ = 14104529023200.

The previous prime is 20569263562171. The next prime is 20569263562229. The reversal of 20569263562225 is 52226536296502.

It is a happy number.

The square root of 20569263562225 is 4535335.

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 12459480980401 + 8109782581824 = 3529799^2 + 2847768^2 .

It is not a de Polignac number, because 20569263562225 - 2¹⁷ = 20569263431153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20569263562229) 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, 158671935 + ... + 158801515.

Almost surely, 2^{20569263562225} is an apocalyptic number.

20569263562225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20569263562225 is the 4535335-th square number.

20569263562225 is the 2267668-th centered octagonal number.

It is an amenable number.

20569263562225 is a deficient number, since it is larger than the sum of its proper divisors (9101078645456).

20569263562225 is an frugal number, since it uses more digits than its factorization.

20569263562225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259186 (or 129593 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 55.

The spelling of 20569263562225 in words is "twenty trillion, five hundred sixty-nine billion, two hundred sixty-three million, five hundred sixty-two thousand, two hundred twenty-five".