20808088225 has 6 divisors (see below), whose sum is σ = 25802029430. Its totient is φ = 16646470560.

The previous prime is 20808088211. The next prime is 20808088271. The reversal of 20808088225 is 52288080802.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5013631249 + 15794456976 = 70807^2 + 125676^2 .

It is not a de Polignac number, because 20808088225 - 2⁷ = 20808088097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 416161740 + ... + 416161789.

Almost surely, 2^20808088225 is an apocalyptic number.

20808088225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20808088225 is a deficient number, since it is larger than the sum of its proper divisors (4993941205).

20808088225 is an equidigital number, since it uses as much as digits as its factorization.

20808088225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832323539 (or 832323534 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 43.

The spelling of 20808088225 in words is "twenty billion, eight hundred eight million, eighty-eight thousand, two hundred twenty-five".