21304041403 has 16 divisors (see below), whose sum is σ = 22665738240. Its totient is φ = 19966716000.

The previous prime is 21304041397. The next prime is 21304041413. The reversal of 21304041403 is 30414040312.

It is a cyclic number.

It is not a de Polignac number, because 21304041403 - 2²⁹ = 20767170491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21304041413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2819076 + ... + 2826622.

It is an arithmetic number, because the mean of its divisors is an integer number (1416608640).

Almost surely, 2^21304041403 is an apocalyptic number.

21304041403 is a deficient number, since it is larger than the sum of its proper divisors (1361696837).

21304041403 is a wasteful number, since it uses less digits than its factorization.

21304041403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21304041403 its reverse (30414040312), we get a palindrome (51718081715).

The spelling of 21304041403 in words is "twenty-one billion, three hundred four million, forty-one thousand, four hundred three".