21013332019903 has 2 divisors, whose sum is σ = 21013332019904. Its totient is φ = 21013332019902.

The previous prime is 21013332019879. The next prime is 21013332019943. The reversal of 21013332019903 is 30991023331012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21013332019903 is a prime.

It is a super-3 number, since 3×21013332019903³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013332019943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506666009951 + 10506666009952.

It is an arithmetic number, because the mean of its divisors is an integer number (10506666009952).

Almost surely, 2^{21013332019903} is an apocalyptic number.

21013332019903 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013332019903 is an equidigital number, since it uses as much as digits as its factorization.

21013332019903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 37.

The spelling of 21013332019903 in words is "twenty-one trillion, thirteen billion, three hundred thirty-two million, nineteen thousand, nine hundred three".