21339141 has 16 divisors (see below), whose sum is σ = 29090880. Its totient is φ = 13910400.

The previous prime is 21339139. The next prime is 21339151. The reversal of 21339141 is 14193312.

It is not a de Polignac number, because 21339141 - 2¹ = 21339139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21339151) 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, 30091 + ... + 30791.

It is an arithmetic number, because the mean of its divisors is an integer number (1818180).

Almost surely, 2^21339141 is an apocalyptic number.

It is an amenable number.

21339141 is a deficient number, since it is larger than the sum of its proper divisors (7751739).

21339141 is a wasteful number, since it uses less digits than its factorization.

21339141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its digits is 648, while the sum is 24.

The square root of 21339141 is about 4619.4308090933. The cubic root of 21339141 is about 277.3696750265.

The spelling of 21339141 in words is "twenty-one million, three hundred thirty-nine thousand, one hundred forty-one".