20353554320225 has 12 divisors (see below), whose sum is σ = 28843894122624. Its totient is φ = 13956722962320.

The previous prime is 20353554320201. The next prime is 20353554320237. The reversal of 20353554320225 is 52202345535302.

It is not a de Polignac number, because 20353554320225 - 2¹⁰ = 20353554319201 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58153012169 + ... + 58153012518.

It is an arithmetic number, because the mean of its divisors is an integer number (2403657843552).

Almost surely, 2^{20353554320225} is an apocalyptic number.

20353554320225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20353554320225 is a deficient number, since it is larger than the sum of its proper divisors (8490339802399).

20353554320225 is a wasteful number, since it uses less digits than its factorization.

20353554320225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116306024704 (or 116306024699 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 41.

Adding to 20353554320225 its reverse (52202345535302), we get a palindrome (72555899855527).

The spelling of 20353554320225 in words is "twenty trillion, three hundred fifty-three billion, five hundred fifty-four million, three hundred twenty thousand, two hundred twenty-five".