20434435330345 has 16 divisors (see below), whose sum is σ = 25591467686400. Its totient is φ = 15634340339904.

The previous prime is 20434435330319. The next prime is 20434435330423. The reversal of 20434435330345 is 54303353443402.

It is a cyclic number.

It is not a de Polignac number, because 20434435330345 - 2⁵ = 20434435330313 is a prime.

It is a super-2 number, since 2×20434435330345² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13152945 + ... + 14624254.

It is an arithmetic number, because the mean of its divisors is an integer number (1599466730400).

Almost surely, 2^{20434435330345} is an apocalyptic number.

It is an amenable number.

20434435330345 is a deficient number, since it is larger than the sum of its proper divisors (5157032356055).

20434435330345 is a wasteful number, since it uses less digits than its factorization.

20434435330345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27783624.

The product of its (nonzero) digits is 3110400, while the sum is 43.

Adding to 20434435330345 its reverse (54303353443402), we get a palindrome (74737788773747).

The spelling of 20434435330345 in words is "twenty trillion, four hundred thirty-four billion, four hundred thirty-five million, three hundred thirty thousand, three hundred forty-five".