21453575175848 has 32 divisors (see below), whose sum is σ = 43742782463400. Its totient is φ = 9822940618752.

The previous prime is 21453575175839. The next prime is 21453575175881. The reversal of 21453575175848 is 84857157535412.

It can be written as a sum of positive squares in 4 ways, for example, as 19342069753444 + 2111505422404 = 4397962^2 + 1453102^2 .

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, 2131709513 + ... + 2131719576.

Almost surely, 2^{21453575175848} is an apocalyptic number.

It is an amenable number.

21453575175848 is an abundant number, since it is smaller than the sum of its proper divisors (22289207287552).

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

21453575175848 is a wasteful number, since it uses less digits than its factorization.

21453575175848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263429149 (or 4263429145 counting only the distinct ones).

The product of its digits is 188160000, while the sum is 65.

The spelling of 21453575175848 in words is "twenty-one trillion, four hundred fifty-three billion, five hundred seventy-five million, one hundred seventy-five thousand, eight hundred forty-eight".