21540132230 has 16 divisors (see below), whose sum is σ = 40812882480. Its totient is φ = 8162576352.

The previous prime is 21540132227. The next prime is 21540132241. The reversal of 21540132230 is 3223104512.

It is a junction number, because it is equal to n+sod(n) for n = 21540132196 and 21540132205.

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, 56684369 + ... + 56684748.

It is an arithmetic number, because the mean of its divisors is an integer number (2550805155).

Almost surely, 2^21540132230 is an apocalyptic number.

21540132230 is a deficient number, since it is larger than the sum of its proper divisors (19272750250).

21540132230 is a wasteful number, since it uses less digits than its factorization.

21540132230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113369143.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21540132230 its reverse (3223104512), we get a palindrome (24763236742).

The spelling of 21540132230 in words is "twenty-one billion, five hundred forty million, one hundred thirty-two thousand, two hundred thirty".