20430768313 has 4 divisors (see below), whose sum is σ = 20543645668. Its totient is φ = 20317890960.

The previous prime is 20430768311. The next prime is 20430768329. The reversal of 20430768313 is 31386703402.

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 65480464 + 20365287849 = 8092^2 + 142707^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430768313 - 2¹ = 20430768311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430768311) 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, 56438406 + ... + 56438767.

It is an arithmetic number, because the mean of its divisors is an integer number (5135911417).

Almost surely, 2^20430768313 is an apocalyptic number.

It is an amenable number.

20430768313 is a deficient number, since it is larger than the sum of its proper divisors (112877355).

20430768313 is a wasteful number, since it uses less digits than its factorization.

20430768313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112877354.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 20430768313 in words is "twenty billion, four hundred thirty million, seven hundred sixty-eight thousand, three hundred thirteen".