21403013103 has 16 divisors (see below), whose sum is σ = 31839746400. Its totient is φ = 14209464960.

The previous prime is 21403013089. The next prime is 21403013117. The reversal of 21403013103 is 30131030412.

It is an interprime number because it is at equal distance from previous prime (21403013089) and next prime (21403013117).

It is not a de Polignac number, because 21403013103 - 2¹⁶ = 21402947567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403013183) 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 15 ways as a sum of consecutive naturals, for example, 1638108 + ... + 1651121.

It is an arithmetic number, because the mean of its divisors is an integer number (1989984150).

Almost surely, 2^21403013103 is an apocalyptic number.

21403013103 is a deficient number, since it is larger than the sum of its proper divisors (10436733297).

21403013103 is a wasteful number, since it uses less digits than its factorization.

21403013103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289479 (or 3289473 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21403013103 its reverse (30131030412), we get a palindrome (51534043515).

The spelling of 21403013103 in words is "twenty-one billion, four hundred three million, thirteen thousand, one hundred three".