21013434103 has 32 divisors (see below), whose sum is σ = 23762833920. Its totient is φ = 18485760000.

The previous prime is 21013434083. The next prime is 21013434119. The reversal of 21013434103 is 30143431012.

It is a cyclic number.

It is not a de Polignac number, because 21013434103 - 2²⁵ = 20979879671 is a prime.

It is a super-2 number, since 2×21013434103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013434163) 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 31 ways as a sum of consecutive naturals, for example, 2177493 + ... + 2187121.

It is an arithmetic number, because the mean of its divisors is an integer number (742588560).

Almost surely, 2^21013434103 is an apocalyptic number.

21013434103 is a deficient number, since it is larger than the sum of its proper divisors (2749399817).

21013434103 is a wasteful number, since it uses less digits than its factorization.

21013434103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9819.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21013434103 its reverse (30143431012), we get a palindrome (51156865115).

The spelling of 21013434103 in words is "twenty-one billion, thirteen million, four hundred thirty-four thousand, one hundred three".