20353253256 has 96 divisors (see below), whose sum is σ = 63375661440. Its totient is φ = 5780369664.

The previous prime is 20353253231. The next prime is 20353253287. The reversal of 20353253256 is 65235235302.

20353253256 is a `hidden beast` number, since 2 + 0 + 3 + 5 + 325 + 325 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20353253256.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36741 + ... + 205076.

It is an arithmetic number, because the mean of its divisors is an integer number (660163140).

Almost surely, 2^20353253256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20353253256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31687830720).

20353253256 is an abundant number, since it is smaller than the sum of its proper divisors (43022408184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20353253256 is a wasteful number, since it uses less digits than its factorization.

20353253256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242003 (or 241996 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 36.

Adding to 20353253256 its reverse (65235235302), we get a palindrome (85588488558).

The spelling of 20353253256 in words is "twenty billion, three hundred fifty-three million, two hundred fifty-three thousand, two hundred fifty-six".