20353612202143 has 32 divisors (see below), whose sum is σ = 23592176713728. Its totient is φ = 17387419240800.

The previous prime is 20353612202111. The next prime is 20353612202159. The reversal of 20353612202143 is 34120221635302.

It is a cyclic number.

It is not a de Polignac number, because 20353612202143 - 2⁵ = 20353612202111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20353612202099 and 20353612202108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353612302143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2964405 + ... + 7035262.

It is an arithmetic number, because the mean of its divisors is an integer number (737255522304).

Almost surely, 2^{20353612202143} is an apocalyptic number.

20353612202143 is a deficient number, since it is larger than the sum of its proper divisors (3238564511585).

20353612202143 is a wasteful number, since it uses less digits than its factorization.

20353612202143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999883.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 20353612202143 its reverse (34120221635302), we get a palindrome (54473833837445).

The spelling of 20353612202143 in words is "twenty trillion, three hundred fifty-three billion, six hundred twelve million, two hundred two thousand, one hundred forty-three".