21435435341 has 4 divisors (see below), whose sum is σ = 21447892284. Its totient is φ = 21422978400.

The previous prime is 21435435323. The next prime is 21435435379. The reversal of 21435435341 is 14353453412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5307705316 + 16127730025 = 72854^2 + 126995^2 .

It is a cyclic number.

It is not a de Polignac number, because 21435435341 - 2¹⁴ = 21435418957 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 (21435435041) 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, 6225890 + ... + 6229331.

It is an arithmetic number, because the mean of its divisors is an integer number (5361973071).

Almost surely, 2^21435435341 is an apocalyptic number.

It is an amenable number.

21435435341 is a deficient number, since it is larger than the sum of its proper divisors (12456943).

21435435341 is a wasteful number, since it uses less digits than its factorization.

21435435341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12456942.

The product of its digits is 86400, while the sum is 35.

Adding to 21435435341 its reverse (14353453412), we get a palindrome (35788888753).

The spelling of 21435435341 in words is "twenty-one billion, four hundred thirty-five million, four hundred thirty-five thousand, three hundred forty-one".