21442465435 has 4 divisors (see below), whose sum is σ = 25730958528. Its totient is φ = 17153972344.

The previous prime is 21442465433. The next prime is 21442465439. The reversal of 21442465435 is 53456424412.

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 21442465435 - 2¹ = 21442465433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442465433) 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, 2144246539 + ... + 2144246548.

It is an arithmetic number, because the mean of its divisors is an integer number (6432739632).

Almost surely, 2^21442465435 is an apocalyptic number.

21442465435 is a deficient number, since it is larger than the sum of its proper divisors (4288493093).

21442465435 is an equidigital number, since it uses as much as digits as its factorization.

21442465435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288493092.

The product of its digits is 460800, while the sum is 40.

Adding to 21442465435 its reverse (53456424412), we get a palindrome (74898889847).

The spelling of 21442465435 in words is "twenty-one billion, four hundred forty-two million, four hundred sixty-five thousand, four hundred thirty-five".