20123324291 has 4 divisors (see below), whose sum is σ = 22998084912. Its totient is φ = 17248563672.

The previous prime is 20123324279. The next prime is 20123324369. The reversal of 20123324291 is 19242332102.

It is a happy number.

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 20123324291 - 2⁶ = 20123324227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123324261) 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, 1437380300 + ... + 1437380313.

It is an arithmetic number, because the mean of its divisors is an integer number (5749521228).

Almost surely, 2^20123324291 is an apocalyptic number.

20123324291 is a deficient number, since it is larger than the sum of its proper divisors (2874760621).

20123324291 is an equidigital number, since it uses as much as digits as its factorization.

20123324291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874760620.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 20123324291 its reverse (19242332102), we get a palindrome (39365656393).

The spelling of 20123324291 in words is "twenty billion, one hundred twenty-three million, three hundred twenty-four thousand, two hundred ninety-one".