20321113123 has 8 divisors (see below), whose sum is σ = 20851845120. Its totient is φ = 19794479880.

The previous prime is 20321113097. The next prime is 20321113129. The reversal of 20321113123 is 32131112302.

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 20321113123 - 2²⁵ = 20287558691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20321113123.

It is not an unprimeable number, because it can be changed into a prime (20321113129) 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, 1014643 + ... + 1034476.

It is an arithmetic number, because the mean of its divisors is an integer number (2606480640).

Almost surely, 2^20321113123 is an apocalyptic number.

20321113123 is a deficient number, since it is larger than the sum of its proper divisors (530731997).

20321113123 is a wasteful number, since it uses less digits than its factorization.

20321113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049377.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20321113123 its reverse (32131112302), we get a palindrome (52452225425).

The spelling of 20321113123 in words is "twenty billion, three hundred twenty-one million, one hundred thirteen thousand, one hundred twenty-three".