21441031252493 has 4 divisors (see below), whose sum is σ = 21845579012028. Its totient is φ = 21036483492960.

The previous prime is 21441031252477. The next prime is 21441031252549. The reversal of 21441031252493 is 39425213014412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18455040340489 + 2985990912004 = 4295933^2 + 1728002^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441031252493 - 2⁴ = 21441031252477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21441031252493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441031252793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202273879688 + ... + 202273879793.

It is an arithmetic number, because the mean of its divisors is an integer number (5461394753007).

Almost surely, 2^{21441031252493} is an apocalyptic number.

It is an amenable number.

21441031252493 is a deficient number, since it is larger than the sum of its proper divisors (404547759535).

21441031252493 is an equidigital number, since it uses as much as digits as its factorization.

21441031252493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404547759534.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 21441031252493 in words is "twenty-one trillion, four hundred forty-one billion, thirty-one million, two hundred fifty-two thousand, four hundred ninety-three".