21302203403 has 8 divisors (see below), whose sum is σ = 22956796800. Its totient is φ = 19649890368.

The previous prime is 21302203367. The next prime is 21302203453. The reversal of 21302203403 is 30430220312.

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 21302203403 - 2⁶ = 21302203339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21302203453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550658 + ... + 588071.

It is an arithmetic number, because the mean of its divisors is an integer number (2869599600).

Almost surely, 2^21302203403 is an apocalyptic number.

21302203403 is a deficient number, since it is larger than the sum of its proper divisors (1654593397).

21302203403 is a wasteful number, since it uses less digits than its factorization.

21302203403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140181.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21302203403 its reverse (30430220312), we get a palindrome (51732423715).

The spelling of 21302203403 in words is "twenty-one billion, three hundred two million, two hundred three thousand, four hundred three".