21403103242 has 8 divisors (see below), whose sum is σ = 33794373600. Its totient is φ = 10138312044.

The previous prime is 21403103233. The next prime is 21403103243. The reversal of 21403103242 is 24230130412.

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

It is not an unprimeable number, because it can be changed into a prime (21403103243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281619742 + ... + 281619817.

It is an arithmetic number, because the mean of its divisors is an integer number (4224296700).

Almost surely, 2^21403103242 is an apocalyptic number.

21403103242 is a deficient number, since it is larger than the sum of its proper divisors (12391270358).

21403103242 is a wasteful number, since it uses less digits than its factorization.

21403103242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563239580.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21403103242 its reverse (24230130412), we get a palindrome (45633233654).

The spelling of 21403103242 in words is "twenty-one billion, four hundred three million, one hundred three thousand, two hundred forty-two".