20320130309 has 16 divisors (see below), whose sum is σ = 20953489536. Its totient is φ = 19698888000.

The previous prime is 20320130293. The next prime is 20320130359. The reversal of 20320130309 is 90303102302.

It is a cyclic number.

It is not a de Polignac number, because 20320130309 - 2⁴ = 20320130293 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 (20320130359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1121099 + ... + 1139079.

It is an arithmetic number, because the mean of its divisors is an integer number (1309593096).

Almost surely, 2^20320130309 is an apocalyptic number.

It is an amenable number.

20320130309 is a deficient number, since it is larger than the sum of its proper divisors (633359227).

20320130309 is a wasteful number, since it uses less digits than its factorization.

20320130309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18316.

The product of its (nonzero) digits is 972, while the sum is 23.

The spelling of 20320130309 in words is "twenty billion, three hundred twenty million, one hundred thirty thousand, three hundred nine".