21303020203 has 8 divisors (see below), whose sum is σ = 21769975872. Its totient is φ = 20836635456.

The previous prime is 21303020171. The next prime is 21303020227. The reversal of 21303020203 is 30202030312.

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 21303020203 - 2⁵ = 21303020171 is a prime.

It is a super-2 number, since 2×21303020203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21303020273) 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, 66850 + ... + 216967.

It is an arithmetic number, because the mean of its divisors is an integer number (2721246984).

Almost surely, 2^21303020203 is an apocalyptic number.

21303020203 is a deficient number, since it is larger than the sum of its proper divisors (466955669).

21303020203 is a wasteful number, since it uses less digits than its factorization.

21303020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285461.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21303020203 its reverse (30202030312), we get a palindrome (51505050515).

The spelling of 21303020203 in words is "twenty-one billion, three hundred three million, twenty thousand, two hundred three".