21104031323 has 8 divisors (see below), whose sum is σ = 21394054080. Its totient is φ = 20814580800.

The previous prime is 21104031281. The next prime is 21104031337. The reversal of 21104031323 is 32313040112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21104031323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21104031295 and 21104031304.

It is not an unprimeable number, because it can be changed into a prime (21104036323) 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, 68528 + ... + 216573.

It is an arithmetic number, because the mean of its divisors is an integer number (2674256760).

Almost surely, 2^21104031323 is an apocalyptic number.

21104031323 is a deficient number, since it is larger than the sum of its proper divisors (290022757).

21104031323 is an equidigital number, since it uses as much as digits as its factorization.

21104031323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286117.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21104031323 its reverse (32313040112), we get a palindrome (53417071435).

The spelling of 21104031323 in words is "twenty-one billion, one hundred four million, thirty-one thousand, three hundred twenty-three".