21014200430 has 16 divisors (see below), whose sum is σ = 37847854800. Its totient is φ = 8400725952.

The previous prime is 21014200421. The next prime is 21014200433. The reversal of 21014200430 is 3400241012.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21014200399 and 21014200408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014200433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601439 + ... + 635418.

It is an arithmetic number, because the mean of its divisors is an integer number (2365490925).

Almost surely, 2^21014200430 is an apocalyptic number.

21014200430 is a deficient number, since it is larger than the sum of its proper divisors (16833654370).

21014200430 is a wasteful number, since it uses less digits than its factorization.

21014200430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238563.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21014200430 its reverse (3400241012), we get a palindrome (24414441442).

The spelling of 21014200430 in words is "twenty-one billion, fourteen million, two hundred thousand, four hundred thirty".