21354141 has 8 divisors (see below), whose sum is σ = 28647520. Its totient is φ = 14148432.

The previous prime is 21354139. The next prime is 21354167. The reversal of 21354141 is 14145312.

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

It is not a de Polignac number, because 21354141 - 2¹ = 21354139 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21346 + ... + 22323.

It is an arithmetic number, because the mean of its divisors is an integer number (3580940).

Almost surely, 2^21354141 is an apocalyptic number.

It is an amenable number.

21354141 is a deficient number, since it is larger than the sum of its proper divisors (7293379).

21354141 is a wasteful number, since it uses less digits than its factorization.

21354141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43835.

The product of its digits is 480, while the sum is 21.

The square root of 21354141 is about 4621.0541005273. The cubic root of 21354141 is about 277.4346506292.

Adding to 21354141 its reverse (14145312), we get a palindrome (35499453).

The spelling of 21354141 in words is "twenty-one million, three hundred fifty-four thousand, one hundred forty-one".