21134410145 has 8 divisors (see below), whose sum is σ = 25384544640. Its totient is φ = 16892026480.

The previous prime is 21134410123. The next prime is 21134410151. The reversal of 21134410145 is 54101443112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21134410145 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1931705 + ... + 1942614.

It is an arithmetic number, because the mean of its divisors is an integer number (3173068080).

Almost surely, 2^21134410145 is an apocalyptic number.

It is an amenable number.

21134410145 is a deficient number, since it is larger than the sum of its proper divisors (4250134495).

21134410145 is a wasteful number, since it uses less digits than its factorization.

21134410145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875415.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 21134410145 its reverse (54101443112), we get a palindrome (75235853257).

The spelling of 21134410145 in words is "twenty-one billion, one hundred thirty-four million, four hundred ten thousand, one hundred forty-five".