21403301203 has 24 divisors (see below), whose sum is σ = 23093080560. Its totient is φ = 19828065600.

The previous prime is 21403301159. The next prime is 21403301207. The reversal of 21403301203 is 30210330412.

It is not a de Polignac number, because 21403301203 - 2²⁵ = 21369746771 is a prime.

It is a super-3 number, since 3×21403301203³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403301207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4193353 + ... + 4198453.

It is an arithmetic number, because the mean of its divisors is an integer number (962211690).

Almost surely, 2^21403301203 is an apocalyptic number.

21403301203 is a deficient number, since it is larger than the sum of its proper divisors (1689779357).

21403301203 is a wasteful number, since it uses less digits than its factorization.

21403301203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395 (or 5376 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21403301203 its reverse (30210330412), we get a palindrome (51613631615).

The spelling of 21403301203 in words is "twenty-one billion, four hundred three million, three hundred one thousand, two hundred three".