21336141 has 16 divisors (see below), whose sum is σ = 29727360. Its totient is φ = 13594560.

The previous prime is 21336137. The next prime is 21336151. The reversal of 21336141 is 14163312.

It is not a de Polignac number, because 21336141 - 2² = 21336137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21336131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7771 + ... + 10151.

It is an arithmetic number, because the mean of its divisors is an integer number (1857960).

Almost surely, 2^21336141 is an apocalyptic number.

It is an amenable number.

21336141 is a deficient number, since it is larger than the sum of its proper divisors (8391219).

21336141 is a wasteful number, since it uses less digits than its factorization.

21336141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516.

The product of its digits is 432, while the sum is 21.

The square root of 21336141 is about 4619.1060823497. The cubic root of 21336141 is about 277.3566762524.

Adding to 21336141 its reverse (14163312), we get a palindrome (35499453).

The spelling of 21336141 in words is "twenty-one million, three hundred thirty-six thousand, one hundred forty-one".