21403240133 has 8 divisors (see below), whose sum is σ = 23467514400. Its totient is φ = 19358720080.

The previous prime is 21403240121. The next prime is 21403240139. The reversal of 21403240133 is 33104230412.

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 21403240133 - 2¹⁴ = 21403223749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21403240099 and 21403240108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403240139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4936283 + ... + 4940616.

It is an arithmetic number, because the mean of its divisors is an integer number (2933439300).

Almost surely, 2^21403240133 is an apocalyptic number.

It is an amenable number.

21403240133 is a deficient number, since it is larger than the sum of its proper divisors (2064274267).

21403240133 is a wasteful number, since it uses less digits than its factorization.

21403240133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9877107.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21403240133 its reverse (33104230412), we get a palindrome (54507470545).

The spelling of 21403240133 in words is "twenty-one billion, four hundred three million, two hundred forty thousand, one hundred thirty-three".