21400203230 has 32 divisors (see below), whose sum is σ = 44359349760. Its totient is φ = 7281200160.

The previous prime is 21400203217. The next prime is 21400203233. The reversal of 21400203230 is 3230200412.

It is a junction number, because it is equal to n+sod(n) for n = 21400203199 and 21400203208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400203233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1157690 + ... + 1176029.

It is an arithmetic number, because the mean of its divisors is an integer number (1386229680).

Almost surely, 2^21400203230 is an apocalyptic number.

21400203230 is an abundant number, since it is smaller than the sum of its proper divisors (22959146530).

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

21400203230 is a wasteful number, since it uses less digits than its factorization.

21400203230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333864.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21400203230 its reverse (3230200412), we get a palindrome (24630403642).

The spelling of 21400203230 in words is "twenty-one billion, four hundred million, two hundred three thousand, two hundred thirty".