20430304133 has 4 divisors (see below), whose sum is σ = 20434892460. Its totient is φ = 20425715808.

The previous prime is 20430304123. The next prime is 20430304157. The reversal of 20430304133 is 33140303402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16420628449 + 4009675684 = 128143^2 + 63322^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430304133 - 2²⁶ = 20363195269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20430304099 and 20430304108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430304123) 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, 2287478 + ... + 2296391.

It is an arithmetic number, because the mean of its divisors is an integer number (5108723115).

Almost surely, 2^20430304133 is an apocalyptic number.

It is an amenable number.

20430304133 is a deficient number, since it is larger than the sum of its proper divisors (4588327).

20430304133 is an equidigital number, since it uses as much as digits as its factorization.

20430304133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588326.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20430304133 its reverse (33140303402), we get a palindrome (53570607535).

The spelling of 20430304133 in words is "twenty billion, four hundred thirty million, three hundred four thousand, one hundred thirty-three".