21400213303 has 12 divisors (see below), whose sum is σ = 24897881352. Its totient is φ = 18340272720.

The previous prime is 21400213279. The next prime is 21400213313. The reversal of 21400213303 is 30331200412.

It is not a de Polignac number, because 21400213303 - 2²¹ = 21398116151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400213313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337168 + ... + 395578.

It is an arithmetic number, because the mean of its divisors is an integer number (2074823446).

Almost surely, 2^21400213303 is an apocalyptic number.

21400213303 is a deficient number, since it is larger than the sum of its proper divisors (3497668049).

21400213303 is an equidigital number, since it uses as much as digits as its factorization.

21400213303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65902 (or 65895 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21400213303 its reverse (30331200412), we get a palindrome (51731413715).

The spelling of 21400213303 in words is "twenty-one billion, four hundred million, two hundred thirteen thousand, three hundred three".