21233511303 has 4 divisors (see below), whose sum is σ = 28311348408. Its totient is φ = 14155674200.

The previous prime is 21233511281. The next prime is 21233511307. The reversal of 21233511303 is 30311533212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21233511303 - 2¹³ = 21233503111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233511307) 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, 3538918548 + ... + 3538918553.

It is an arithmetic number, because the mean of its divisors is an integer number (7077837102).

Almost surely, 2^21233511303 is an apocalyptic number.

21233511303 is a deficient number, since it is larger than the sum of its proper divisors (7077837105).

21233511303 is an equidigital number, since it uses as much as digits as its factorization.

21233511303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7077837104.

The product of its (nonzero) digits is 1620, while the sum is 24.

The spelling of 21233511303 in words is "twenty-one billion, two hundred thirty-three million, five hundred eleven thousand, three hundred three".