20340430309 has 8 divisors (see below), whose sum is σ = 20963206880. Its totient is φ = 19724460336.

The previous prime is 20340430301. The next prime is 20340430339. The reversal of 20340430309 is 90303404302.

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

It is a cyclic number.

It is not a de Polignac number, because 20340430309 - 2³ = 20340430301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340430301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695582 + ... + 1707535.

It is an arithmetic number, because the mean of its divisors is an integer number (2620400860).

Almost surely, 2^20340430309 is an apocalyptic number.

It is an amenable number.

20340430309 is a deficient number, since it is larger than the sum of its proper divisors (622776571).

20340430309 is a wasteful number, since it uses less digits than its factorization.

20340430309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403299.

The product of its (nonzero) digits is 7776, while the sum is 28.

The spelling of 20340430309 in words is "twenty billion, three hundred forty million, four hundred thirty thousand, three hundred nine".