21303413303 has 8 divisors (see below), whose sum is σ = 23537275488. Its totient is φ = 19178520064.

The previous prime is 21303413293. The next prime is 21303413309. The reversal of 21303413303 is 30331430312.

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 21303413303 - 2¹⁸ = 21303151159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303413309) 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, 27241826 + ... + 27242607.

It is an arithmetic number, because the mean of its divisors is an integer number (2942159436).

Almost surely, 2^21303413303 is an apocalyptic number.

21303413303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21303413303 is a deficient number, since it is larger than the sum of its proper divisors (2233862185).

21303413303 is a wasteful number, since it uses less digits than its factorization.

21303413303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54484473.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21303413303 its reverse (30331430312), we get a palindrome (51634843615).

The spelling of 21303413303 in words is "twenty-one billion, three hundred three million, four hundred thirteen thousand, three hundred three".