21545340230 has 32 divisors (see below), whose sum is σ = 38898102528. Its totient is φ = 8592287200.

The previous prime is 21545340227. The next prime is 21545340277. The reversal of 21545340230 is 3204354512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21545340193 and 21545340202.

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, 8890799 + ... + 8893221.

It is an arithmetic number, because the mean of its divisors is an integer number (1215565704).

Almost surely, 2^21545340230 is an apocalyptic number.

21545340230 is a deficient number, since it is larger than the sum of its proper divisors (17352762298).

21545340230 is a wasteful number, since it uses less digits than its factorization.

21545340230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 21545340230 its reverse (3204354512), we get a palindrome (24749694742).

The spelling of 21545340230 in words is "twenty-one billion, five hundred forty-five million, three hundred forty thousand, two hundred thirty".