21326141 has 4 divisors (see below), whose sum is σ = 21351072. Its totient is φ = 21301212.

The previous prime is 21326131. The next prime is 21326161. The reversal of 21326141 is 14162312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21326141 - 2⁶ = 21326077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21326101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11135 + ... + 12908.

It is an arithmetic number, because the mean of its divisors is an integer number (5337768).

Almost surely, 2^21326141 is an apocalyptic number.

It is an amenable number.

21326141 is a deficient number, since it is larger than the sum of its proper divisors (24931).

21326141 is an equidigital number, since it uses as much as digits as its factorization.

21326141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24930.

The product of its digits is 288, while the sum is 20.

The square root of 21326141 is about 4618.0234949597. The cubic root of 21326141 is about 277.3133382031.

Adding to 21326141 its reverse (14162312), we get a palindrome (35488453).

The spelling of 21326141 in words is "twenty-one million, three hundred twenty-six thousand, one hundred forty-one".