21103033023 has 12 divisors (see below), whose sum is σ = 30484005240. Its totient is φ = 14067836496.

The previous prime is 21103032983. The next prime is 21103033087. The reversal of 21103033023 is 32033030112.

It is not a de Polignac number, because 21103033023 - 2¹⁷ = 21102901951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21103032987 and 21103033005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103033723) 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 11 ways as a sum of consecutive naturals, for example, 110140 + ... + 233102.

It is an arithmetic number, because the mean of its divisors is an integer number (2540333770).

Almost surely, 2^21103033023 is an apocalyptic number.

21103033023 is a deficient number, since it is larger than the sum of its proper divisors (9380972217).

21103033023 is a wasteful number, since it uses less digits than its factorization.

21103033023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142038 (or 142035 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21103033023 its reverse (32033030112), we get a palindrome (53136063135).

The spelling of 21103033023 in words is "twenty-one billion, one hundred three million, thirty-three thousand, twenty-three".