21441339 has 6 divisors (see below), whose sum is σ = 30970836. Its totient is φ = 14294220.

The previous prime is 21441337. The next prime is 21441347. The reversal of 21441339 is 93314412.

21441339 is a `hidden beast` number, since 214 + 413 + 39 = 666.

It is not a de Polignac number, because 21441339 - 2¹ = 21441337 is a prime.

It is a super-2 number, since 2×21441339² = 919462036225842, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (21441337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1191177 + ... + 1191194.

It is an arithmetic number, because the mean of its divisors is an integer number (5161806).

Almost surely, 2^21441339 is an apocalyptic number.

21441339 is a deficient number, since it is larger than the sum of its proper divisors (9529497).

21441339 is a wasteful number, since it uses less digits than its factorization.

21441339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382377 (or 2382374 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 21441339 is about 4630.4793488364. The cubic root of 21441339 is about 277.8117655064.

The spelling of 21441339 in words is "twenty-one million, four hundred forty-one thousand, three hundred thirty-nine".