21404203030 has 24 divisors (see below), whose sum is σ = 44817781248. Its totient is φ = 7338583728.

The previous prime is 21404202947. The next prime is 21404203033. The reversal of 21404203030 is 3030240412.

It is a super-2 number, since 2×21404203030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21404202989 and 21404203007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404203033) 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, 21840534 + ... + 21841513.

It is an arithmetic number, because the mean of its divisors is an integer number (1867407552).

Almost surely, 2^21404203030 is an apocalyptic number.

21404203030 is an abundant number, since it is smaller than the sum of its proper divisors (23413578218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21404203030 is a wasteful number, since it uses less digits than its factorization.

21404203030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43682068 (or 43682061 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21404203030 its reverse (3030240412), we get a palindrome (24434443442).

The spelling of 21404203030 in words is "twenty-one billion, four hundred four million, two hundred three thousand, thirty".