20364717025 has 9 divisors (see below), whose sum is σ = 25253133913. Its totient is φ = 16291202800.

The previous prime is 20364717013. The next prime is 20364717041. The reversal of 20364717025 is 52071746302.

It is a happy number.

The square root of 20364717025 is 142705.

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 3249798049 + 17114918976 = 57007^2 + 130824^2 .

It is not a de Polignac number, because 20364717025 - 2⁹ = 20364716513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 699255 + ... + 727795.

Almost surely, 2^20364717025 is an apocalyptic number.

20364717025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20364717025 is the 142705-th square number.

20364717025 is the 71353-rd centered octagonal number.

It is an amenable number.

20364717025 is a deficient number, since it is larger than the sum of its proper divisors (4888416888).

20364717025 is an frugal number, since it uses more digits than its factorization.

20364717025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57092 (or 28546 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20364717025 in words is "twenty billion, three hundred sixty-four million, seven hundred seventeen thousand, twenty-five".