21052932443549 has 8 divisors (see below), whose sum is σ = 22291439018688. Its totient is φ = 19814436844480.

The previous prime is 21052932443533. The next prime is 21052932443623. The reversal of 21052932443549 is 94534423925012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21052932443549 - 2⁴ = 21052932443533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21052932443549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052932443149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1382264 + ... + 6634494.

It is an arithmetic number, because the mean of its divisors is an integer number (2786429877336).

Almost surely, 2^{21052932443549} is an apocalyptic number.

It is an amenable number.

21052932443549 is a deficient number, since it is larger than the sum of its proper divisors (1238506575139).

21052932443549 is a wasteful number, since it uses less digits than its factorization.

21052932443549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488035.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 21052932443549 in words is "twenty-one trillion, fifty-two billion, nine hundred thirty-two million, four hundred forty-three thousand, five hundred forty-nine".