21404204030 has 32 divisors (see below), whose sum is σ = 42422901120. Its totient is φ = 7710601120.

The previous prime is 21404204027. The next prime is 21404204047. The reversal of 21404204030 is 3040240412.

It is a junction number, because it is equal to n+sod(n) for n = 21404203993 and 21404204011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897500 + ... + 921039.

It is an arithmetic number, because the mean of its divisors is an integer number (1325715660).

Almost surely, 2^21404204030 is an apocalyptic number.

21404204030 is a deficient number, since it is larger than the sum of its proper divisors (21018697090).

21404204030 is a wasteful number, since it uses less digits than its factorization.

21404204030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818664.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21404204030 its reverse (3040240412), we get a palindrome (24444444442).

The spelling of 21404204030 in words is "twenty-one billion, four hundred four million, two hundred four thousand, thirty".