21540275700000 has 144 divisors (see below), whose sum is σ = 70674507167040. Its totient is φ = 5744073440000.

The previous prime is 21540275699953. The next prime is 21540275700049. The reversal of 21540275700000 is 757204512.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35600460 + ... + 36200459.

It is an arithmetic number, because the mean of its divisors is an integer number (490795188660).

Almost surely, 2^{21540275700000} is an apocalyptic number.

21540275700000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21540275700000 is an abundant number, since it is smaller than the sum of its proper divisors (49134231467040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21540275700000 is an frugal number, since it uses more digits than its factorization.

21540275700000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71800957 (or 71800929 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The spelling of 21540275700000 in words is "twenty-one trillion, five hundred forty billion, two hundred seventy-five million, seven hundred thousand".