21350352303 has 64 divisors (see below), whose sum is σ = 37124116480. Its totient is φ = 11873088864.

The previous prime is 21350352281. The next prime is 21350352319. The reversal of 21350352303 is 30325305312.

21350352303 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 0 + 352 + 303 = 666.

It is not a de Polignac number, because 21350352303 - 2⁹ = 21350351791 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350352103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2295300 + ... + 2304582.

It is an arithmetic number, because the mean of its divisors is an integer number (580064320).

Almost surely, 2^21350352303 is an apocalyptic number.

21350352303 is a deficient number, since it is larger than the sum of its proper divisors (15773764177).

21350352303 is a wasteful number, since it uses less digits than its factorization.

21350352303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9625 (or 9619 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 27.

Adding to 21350352303 its reverse (30325305312), we get a palindrome (51675657615).

The spelling of 21350352303 in words is "twenty-one billion, three hundred fifty million, three hundred fifty-two thousand, three hundred three".