20054808225 has 63 divisors (see below), whose sum is σ = 37320464233. Its totient is φ = 10685701440.

The previous prime is 20054808223. The next prime is 20054808281. The reversal of 20054808225 is 52280845002.

The square root of 20054808225 is 141615.

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 2149156881 + 17905651344 = 46359^2 + 133812^2 .

It is not a de Polignac number, because 20054808225 - 2¹ = 20054808223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20054808225.

It is not an unprimeable number, because it can be changed into a prime (20054808223) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 19117501 + ... + 19118549.

Almost surely, 2^20054808225 is an apocalyptic number.

20054808225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20054808225 is the 141615-th square number.

20054808225 is the 70808-th centered octagonal number.

It is an amenable number.

20054808225 is a deficient number, since it is larger than the sum of its proper divisors (17265656008).

20054808225 is an frugal number, since it uses more digits than its factorization.

20054808225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

Multiplying 20054808225 by its sum of digits (36), we get a square (721973096100 = 849690²).

The spelling of 20054808225 in words is "twenty billion, fifty-four million, eight hundred eight thousand, two hundred twenty-five".