21343234393 has 8 divisors (see below), whose sum is σ = 23086280448. Its totient is φ = 19614653904.

The previous prime is 21343234391. The next prime is 21343234417. The reversal of 21343234393 is 39343234312.

It is a happy number.

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 21343234393 - 2¹ = 21343234391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21343234391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3613321 + ... + 3619222.

It is an arithmetic number, because the mean of its divisors is an integer number (2885785056).

Almost surely, 2^21343234393 is an apocalyptic number.

It is an amenable number.

21343234393 is a deficient number, since it is larger than the sum of its proper divisors (1743046055).

21343234393 is a wasteful number, since it uses less digits than its factorization.

21343234393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232783.

The product of its digits is 139968, while the sum is 37.

The spelling of 21343234393 in words is "twenty-one billion, three hundred forty-three million, two hundred thirty-four thousand, three hundred ninety-three".