21275849570450 has 24 divisors (see below), whose sum is σ = 39608508308772. Its totient is φ = 8502720880320.

The previous prime is 21275849570447. The next prime is 21275849570483. The reversal of 21275849570450 is 5407594857212.

It can be written as a sum of positive squares in 6 ways, for example, as 6858055826521 + 14417793743929 = 2618789^2 + 3797077^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21275849570450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190417289 + ... + 190528988.

Almost surely, 2^{21275849570450} is an apocalyptic number.

21275849570450 is a deficient number, since it is larger than the sum of its proper divisors (18332658738322).

21275849570450 is a wasteful number, since it uses less digits than its factorization.

21275849570450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380947406 (or 380947401 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 59.

The spelling of 21275849570450 in words is "twenty-one trillion, two hundred seventy-five billion, eight hundred forty-nine million, five hundred seventy thousand, four hundred fifty".