21020413020203 has 8 divisors (see below), whose sum is σ = 21165310560768. Its totient is φ = 20875709845224.

The previous prime is 21020413020181. The next prime is 21020413020241. The reversal of 21020413020203 is 30202031402012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21020413020203 - 2¹⁴ = 21020413003819 is a prime.

It is a super-2 number, since 2×21020413020203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020413020283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48374351 + ... + 48806952.

It is an arithmetic number, because the mean of its divisors is an integer number (2645663820096).

Almost surely, 2^{21020413020203} is an apocalyptic number.

21020413020203 is a deficient number, since it is larger than the sum of its proper divisors (144897540565).

21020413020203 is a wasteful number, since it uses less digits than its factorization.

21020413020203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97182793.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21020413020203 its reverse (30202031402012), we get a palindrome (51222444422215).

The spelling of 21020413020203 in words is "twenty-one trillion, twenty billion, four hundred thirteen million, twenty thousand, two hundred three".