21323103023 has 32 divisors (see below), whose sum is σ = 22677749760. Its totient is φ = 20022266880.

The previous prime is 21323103017. The next prime is 21323103037. The reversal of 21323103023 is 32030132312.

It is a cyclic number.

It is not a de Polignac number, because 21323103023 - 2¹⁶ = 21323037487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323102986 and 21323103004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323103013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60405215 + ... + 60405567.

It is an arithmetic number, because the mean of its divisors is an integer number (708679680).

Almost surely, 2^21323103023 is an apocalyptic number.

21323103023 is a deficient number, since it is larger than the sum of its proper divisors (1354646737).

21323103023 is a wasteful number, since it uses less digits than its factorization.

21323103023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21323103023 its reverse (32030132312), we get a palindrome (53353235335).

The spelling of 21323103023 in words is "twenty-one billion, three hundred twenty-three million, one hundred three thousand, twenty-three".