21255241354363 has 4 divisors (see below), whose sum is σ = 21988180711440. Its totient is φ = 20522301997288.

The previous prime is 21255241354357. The next prime is 21255241354367. The reversal of 21255241354363 is 36345314255212.

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

It is a cyclic number.

It is not a de Polignac number, because 21255241354363 - 2⁵ = 21255241354331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21255241354367) 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, 366469678495 + ... + 366469678552.

It is an arithmetic number, because the mean of its divisors is an integer number (5497045177860).

Almost surely, 2^{21255241354363} is an apocalyptic number.

21255241354363 is a deficient number, since it is larger than the sum of its proper divisors (732939357077).

21255241354363 is an equidigital number, since it uses as much as digits as its factorization.

21255241354363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732939357076.

The product of its digits is 2592000, while the sum is 46.

The spelling of 21255241354363 in words is "twenty-one trillion, two hundred fifty-five billion, two hundred forty-one million, three hundred fifty-four thousand, three hundred sixty-three".