21412135445 has 4 divisors (see below), whose sum is σ = 25694562540. Its totient is φ = 17129708352.

The previous prime is 21412135417. The next prime is 21412135469. The reversal of 21412135445 is 54453121412.

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 17081705809 + 4330429636 = 130697^2 + 65806^2 .

It is a cyclic number.

It is not a de Polignac number, because 21412135445 - 2⁸ = 21412135189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2141213540 + ... + 2141213549.

It is an arithmetic number, because the mean of its divisors is an integer number (6423640635).

Almost surely, 2^21412135445 is an apocalyptic number.

It is an amenable number.

21412135445 is a deficient number, since it is larger than the sum of its proper divisors (4282427095).

21412135445 is an equidigital number, since it uses as much as digits as its factorization.

21412135445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282427094.

The product of its digits is 19200, while the sum is 32.

Adding to 21412135445 its reverse (54453121412), we get a palindrome (75865256857).

The spelling of 21412135445 in words is "twenty-one billion, four hundred twelve million, one hundred thirty-five thousand, four hundred forty-five".