21403030311 has 48 divisors (see below), whose sum is σ = 35286451200. Its totient is φ = 12384230400.

The previous prime is 21403030303. The next prime is 21403030321. The reversal of 21403030311 is 11303030412.

It is not a de Polignac number, because 21403030311 - 2³ = 21403030303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403030321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2284665 + ... + 2294013.

It is an arithmetic number, because the mean of its divisors is an integer number (735134400).

Almost surely, 2^21403030311 is an apocalyptic number.

21403030311 is a deficient number, since it is larger than the sum of its proper divisors (13883420889).

21403030311 is a wasteful number, since it uses less digits than its factorization.

21403030311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10536 (or 10533 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21403030311 its reverse (11303030412), we get a palindrome (32706060723).

The spelling of 21403030311 in words is "twenty-one billion, four hundred three million, thirty thousand, three hundred eleven".