21035233343 has 4 divisors (see below), whose sum is σ = 21095853960. Its totient is φ = 20974612728.

The previous prime is 21035233321. The next prime is 21035233391. The reversal of 21035233343 is 34333253012.

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 21035233343 - 2²⁰ = 21034184767 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 (21035233643) 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, 30309788 + ... + 30310481.

It is an arithmetic number, because the mean of its divisors is an integer number (5273963490).

Almost surely, 2^21035233343 is an apocalyptic number.

21035233343 is a deficient number, since it is larger than the sum of its proper divisors (60620617).

21035233343 is an equidigital number, since it uses as much as digits as its factorization.

21035233343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60620616.

The product of its (nonzero) digits is 19440, while the sum is 29.

Adding to 21035233343 its reverse (34333253012), we get a palindrome (55368486355).

The spelling of 21035233343 in words is "twenty-one billion, thirty-five million, two hundred thirty-three thousand, three hundred forty-three".