20353234543999 has 48 divisors (see below), whose sum is σ = 24959883179520. Its totient is φ = 16522849674240.

The previous prime is 20353234543921. The next prime is 20353234544017. The reversal of 20353234543999 is 99934543235302.

It is not a de Polignac number, because 20353234543999 - 2⁷ = 20353234543871 is a prime.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353234513999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 406137954 + ... + 406188064.

It is an arithmetic number, because the mean of its divisors is an integer number (519997566240).

Almost surely, 2^{20353234543999} is an apocalyptic number.

20353234543999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20353234543999 is a deficient number, since it is larger than the sum of its proper divisors (4606648635521).

20353234543999 is a wasteful number, since it uses less digits than its factorization.

20353234543999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55600 (or 55593 counting only the distinct ones).

The product of its (nonzero) digits is 94478400, while the sum is 61.

The spelling of 20353234543999 in words is "twenty trillion, three hundred fifty-three billion, two hundred thirty-four million, five hundred forty-three thousand, nine hundred ninety-nine".