21253086838367 has 8 divisors (see below), whose sum is σ = 21276076567200. Its totient is φ = 21230097767424.

The previous prime is 21253086838351. The next prime is 21253086838441. The reversal of 21253086838367 is 76383868035212.

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 21253086838367 - 2⁴ = 21253086838351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21253086834367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92722559 + ... + 92951487.

It is an arithmetic number, because the mean of its divisors is an integer number (2659509570900).

Almost surely, 2^{21253086838367} is an apocalyptic number.

21253086838367 is a deficient number, since it is larger than the sum of its proper divisors (22989728833).

21253086838367 is an equidigital number, since it uses as much as digits as its factorization.

21253086838367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328945.

The product of its (nonzero) digits is 69672960, while the sum is 62.

The spelling of 21253086838367 in words is "twenty-one trillion, two hundred fifty-three billion, eighty-six million, eight hundred thirty-eight thousand, three hundred sixty-seven".