21374260003243 has 4 divisors (see below), whose sum is σ = 24427725718000. Its totient is φ = 18320794288488.

The previous prime is 21374260003241. The next prime is 21374260003249. The reversal of 21374260003243 is 34230006247312.

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 21374260003243 - 2¹ = 21374260003241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21374260003241) 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, 1526732857368 + ... + 1526732857381.

It is an arithmetic number, because the mean of its divisors is an integer number (6106931429500).

Almost surely, 2^{21374260003243} is an apocalyptic number.

21374260003243 is a deficient number, since it is larger than the sum of its proper divisors (3053465714757).

21374260003243 is an equidigital number, since it uses as much as digits as its factorization.

21374260003243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053465714756.

The product of its (nonzero) digits is 145152, while the sum is 37.

The spelling of 21374260003243 in words is "twenty-one trillion, three hundred seventy-four billion, two hundred sixty million, three thousand, two hundred forty-three".