20435103405203 has 4 divisors (see below), whose sum is σ = 20435189085768. Its totient is φ = 20435017724640.

The previous prime is 20435103405133. The next prime is 20435103405217. The reversal of 20435103405203 is 30250430153402.

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

It is a cyclic number.

It is not a de Polignac number, because 20435103405203 - 2²⁴ = 20435086627987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20435103405203.

It is not an unprimeable number, because it can be changed into a prime (20435103405263) 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, 42481526 + ... + 42959867.

It is an arithmetic number, because the mean of its divisors is an integer number (5108797271442).

Almost surely, 2^{20435103405203} is an apocalyptic number.

20435103405203 is a deficient number, since it is larger than the sum of its proper divisors (85680565).

20435103405203 is an equidigital number, since it uses as much as digits as its factorization.

20435103405203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85680564.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 20435103405203 its reverse (30250430153402), we get a palindrome (50685533558605).

The spelling of 20435103405203 in words is "twenty trillion, four hundred thirty-five billion, one hundred three million, four hundred five thousand, two hundred three".