21412404403 has 32 divisors (see below), whose sum is σ = 23752854720. Its totient is φ = 19181352960.

The previous prime is 21412404397. The next prime is 21412404449. The reversal of 21412404403 is 30440421412.

It is a cyclic number.

It is not a de Polignac number, because 21412404403 - 2¹³ = 21412396211 is a prime.

It is a super-2 number, since 2×21412404403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412401403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34703751 + ... + 34704367.

It is an arithmetic number, because the mean of its divisors is an integer number (742276710).

Almost surely, 2^21412404403 is an apocalyptic number.

21412404403 is a deficient number, since it is larger than the sum of its proper divisors (2340450317).

21412404403 is a wasteful number, since it uses less digits than its factorization.

21412404403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21412404403 its reverse (30440421412), we get a palindrome (51852825815).

The spelling of 21412404403 in words is "twenty-one billion, four hundred twelve million, four hundred four thousand, four hundred three".