21052671245762 has 64 divisors (see below), whose sum is σ = 35197205164128. Its totient is φ = 9381861120000.

The previous prime is 21052671245759. The next prime is 21052671245777. The reversal of 21052671245762 is 26754217625012.

It is a Cunningham number, because it is equal to 4588319²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 10166487241 + 21042504758521 = 100829^2 + 4587211^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21052671245762.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266649212 + ... + 266728152.

Almost surely, 2^{21052671245762} is an apocalyptic number.

21052671245762 is a deficient number, since it is larger than the sum of its proper divisors (14144533918366).

21052671245762 is a wasteful number, since it uses less digits than its factorization.

21052671245762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81575.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 21052671245762 in words is "twenty-one trillion, fifty-two billion, six hundred seventy-one million, two hundred forty-five thousand, seven hundred sixty-two".