21543525130 has 16 divisors (see below), whose sum is σ = 38781470304. Its totient is φ = 8616715600.

The previous prime is 21543525121. The next prime is 21543525149. The reversal of 21543525130 is 3152534512.

It is a junction number, because it is equal to n+sod(n) for n = 21543525092 and 21543525101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54429 + ... + 214591.

It is an arithmetic number, because the mean of its divisors is an integer number (2423841894).

Almost surely, 2^21543525130 is an apocalyptic number.

21543525130 is a deficient number, since it is larger than the sum of its proper divisors (17237945174).

21543525130 is a wasteful number, since it uses less digits than its factorization.

21543525130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173621.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 21543525130 in words is "twenty-one billion, five hundred forty-three million, five hundred twenty-five thousand, one hundred thirty".