20344135452043 has 4 divisors (see below), whose sum is σ = 21909068948368. Its totient is φ = 18779201955720.

The previous prime is 20344135452013. The next prime is 20344135452127. The reversal of 20344135452043 is 34025453144302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344135452043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20344135451987 and 20344135452005.

It is not an unprimeable number, because it can be changed into a prime (20344135452013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782466748143 + ... + 782466748168.

It is an arithmetic number, because the mean of its divisors is an integer number (5477267237092).

Almost surely, 2^{20344135452043} is an apocalyptic number.

20344135452043 is a deficient number, since it is larger than the sum of its proper divisors (1564933496325).

20344135452043 is a wasteful number, since it uses less digits than its factorization.

20344135452043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564933496324.

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 20344135452043 its reverse (34025453144302), we get a palindrome (54369588596345).

The spelling of 20344135452043 in words is "twenty trillion, three hundred forty-four billion, one hundred thirty-five million, four hundred fifty-two thousand, forty-three".