20434331353245 has 64 divisors (see below), whose sum is σ = 35288404039680. Its totient is φ = 10063894595328.

The previous prime is 20434331353147. The next prime is 20434331353301. The reversal of 20434331353245 is 54235313343402.

It is not a de Polignac number, because 20434331353245 - 2²⁰ = 20434330304669 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20434331353197 and 20434331353206.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4256247 + ... + 7680123.

It is an arithmetic number, because the mean of its divisors is an integer number (551381313120).

Almost surely, 2^{20434331353245} is an apocalyptic number.

It is an amenable number.

20434331353245 is a deficient number, since it is larger than the sum of its proper divisors (14854072686435).

20434331353245 is a wasteful number, since it uses less digits than its factorization.

20434331353245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424434.

The product of its (nonzero) digits is 1555200, while the sum is 42.

Adding to 20434331353245 its reverse (54235313343402), we get a palindrome (74669644696647).

The spelling of 20434331353245 in words is "twenty trillion, four hundred thirty-four billion, three hundred thirty-one million, three hundred fifty-three thousand, two hundred forty-five".