20512345043 has 8 divisors (see below), whose sum is σ = 20944216800. Its totient is φ = 20084948928.

The previous prime is 20512345037. The next prime is 20512345067. The reversal of 20512345043 is 34054321502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20512345043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20512344997 and 20512345015.

It is not an unprimeable number, because it can be changed into a prime (20512345543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109648 + ... + 1127981.

It is an arithmetic number, because the mean of its divisors is an integer number (2618027100).

Almost surely, 2^20512345043 is an apocalyptic number.

20512345043 is a deficient number, since it is larger than the sum of its proper divisors (431871757).

20512345043 is a wasteful number, since it uses less digits than its factorization.

20512345043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237821.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20512345043 its reverse (34054321502), we get a palindrome (54566666545).

The spelling of 20512345043 in words is "twenty billion, five hundred twelve million, three hundred forty-five thousand, forty-three".