21203032023 has 12 divisors (see below), whose sum is σ = 30942341248. Its totient is φ = 13989628800.

The previous prime is 21203031979. The next prime is 21203032063. The reversal of 21203032023 is 32023030212.

It is a happy number.

It is not a de Polignac number, because 21203032023 - 2⁶ = 21203031959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21203031987 and 21203032005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203032063) 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, 12142903 + ... + 12144648.

Almost surely, 2^21203032023 is an apocalyptic number.

21203032023 is a deficient number, since it is larger than the sum of its proper divisors (9739309225).

21203032023 is a wasteful number, since it uses less digits than its factorization.

21203032023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24287654 (or 24287651 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21203032023 its reverse (32023030212), we get a palindrome (53226062235).

The spelling of 21203032023 in words is "twenty-one billion, two hundred three million, thirty-two thousand, twenty-three".