21200303023 has 2 divisors, whose sum is σ = 21200303024. Its totient is φ = 21200303022.

The previous prime is 21200303017. The next prime is 21200303039. The reversal of 21200303023 is 32030300212.

It is an a-pointer prime, because the next prime (21200303039) can be obtained adding 21200303023 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200303023 - 2¹³ = 21200294831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21200302988 and 21200303006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200303063) 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 as a sum of consecutive naturals, namely, 10600151511 + 10600151512.

It is an arithmetic number, because the mean of its divisors is an integer number (10600151512).

Almost surely, 2^21200303023 is an apocalyptic number.

21200303023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200303023 is an equidigital number, since it uses as much as digits as its factorization.

21200303023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21200303023 its reverse (32030300212), we get a palindrome (53230603235).

The spelling of 21200303023 in words is "twenty-one billion, two hundred million, three hundred three thousand, twenty-three".