21540314230 has 16 divisors (see below), whose sum is σ = 38898866160. Its totient is φ = 8588058912.

The previous prime is 21540314207. The next prime is 21540314249. The reversal of 21540314230 is 3241304512.

It is a junction number, because it is equal to n+sod(n) for n = 21540314195 and 21540314204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3505125 + ... + 3511264.

It is an arithmetic number, because the mean of its divisors is an integer number (2431179135).

Almost surely, 2^21540314230 is an apocalyptic number.

21540314230 is a deficient number, since it is larger than the sum of its proper divisors (17358551930).

21540314230 is a wasteful number, since it uses less digits than its factorization.

21540314230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016703.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21540314230 its reverse (3241304512), we get a palindrome (24781618742).

The spelling of 21540314230 in words is "twenty-one billion, five hundred forty million, three hundred fourteen thousand, two hundred thirty".