20323513211 has 4 divisors (see below), whose sum is σ = 20354353800. Its totient is φ = 20292672624.

The previous prime is 20323513183. The next prime is 20323513271. The reversal of 20323513211 is 11231532302.

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 20323513211 - 2¹⁴ = 20323496827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323513271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15419306 + ... + 15420623.

It is an arithmetic number, because the mean of its divisors is an integer number (5088588450).

Almost surely, 2^20323513211 is an apocalyptic number.

20323513211 is a deficient number, since it is larger than the sum of its proper divisors (30840589).

20323513211 is an equidigital number, since it uses as much as digits as its factorization.

20323513211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30840588.

The product of its (nonzero) digits is 1080, while the sum is 23.

The spelling of 20323513211 in words is "twenty billion, three hundred twenty-three million, five hundred thirteen thousand, two hundred eleven".