21343713342551 has 8 divisors (see below), whose sum is σ = 21645487017504. Its totient is φ = 21041971834240.

The previous prime is 21343713342533. The next prime is 21343713342557. The reversal of 21343713342551 is 15524331734312.

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 21343713342551 - 2¹⁴ = 21343713326167 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 (21343713342557) 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, 6703646 + ... + 9360891.

It is an arithmetic number, because the mean of its divisors is an integer number (2705685877188).

Almost surely, 2^{21343713342551} is an apocalyptic number.

21343713342551 is a deficient number, since it is larger than the sum of its proper divisors (301773674953).

21343713342551 is a wasteful number, since it uses less digits than its factorization.

21343713342551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16083321.

The product of its digits is 907200, while the sum is 44.

The spelling of 21343713342551 in words is "twenty-one trillion, three hundred forty-three billion, seven hundred thirteen million, three hundred forty-two thousand, five hundred fifty-one".